Merge branch 'linus' into x86/memory-corruption-check

45 files changed, 892 insertions, 444 deletions

diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index 335d45ecde6..66348c92f88 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -12,6 +12,12 @@ config SND_HWDEP
 config SND_RAWMIDI
 	tristate
 
+# To be effective this also requires INPUT - users should say:
+#    select SND_JACK if INPUT=y || INPUT=SND
+# to avoid having to force INPUT on.
+config SND_JACK
+	bool
+
 config SND_SEQUENCER
 	tristate "Sequencer support"
 	select SND_TIMER
@@ -38,6 +44,7 @@ config SND_SEQ_DUMMY
 	  will be called snd-seq-dummy.
 
 config SND_OSSEMUL
+	select SOUND_OSS_CORE
 	bool
 
 config SND_MIXER_OSS
@@ -101,6 +108,9 @@ config SND_RTCTIMER
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-rtctimer.
 
+	  Note that this option is exclusive with the new RTC drivers
+	  (CONFIG_RTC_CLASS) since this requires the old API.
+
 config SND_SEQ_RTCTIMER_DEFAULT
 	bool "Use RTC as default sequencer timer"
 	depends on SND_RTCTIMER && SND_SEQUENCER
diff --git a/sound/core/Makefile b/sound/core/Makefile
index da8e685eef9..d57125a5687 100644
--- a/sound/core/Makefile
+++ b/sound/core/Makefile
@@ -7,6 +7,7 @@ snd-y     := sound.o init.o memory.o info.o control.o misc.o device.o
 snd-$(CONFIG_ISA_DMA_API) += isadma.o
 snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o info_oss.o
 snd-$(CONFIG_SND_VMASTER) += vmaster.o
+snd-$(CONFIG_SND_JACK)	  += jack.o
 
 snd-pcm-objs := pcm.o pcm_native.o pcm_lib.o pcm_timer.o pcm_misc.o \
 		pcm_memory.o
diff --git a/sound/core/control.c b/sound/core/control.c
index 281b2e2ef0e..6d71f9a7ccb 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -139,7 +139,8 @@ void snd_ctl_notify(struct snd_card *card, unsigned int mask,
 	struct snd_ctl_file *ctl;
 	struct snd_kctl_event *ev;
 	
-	snd_assert(card != NULL && id != NULL, return);
+	if (snd_BUG_ON(!card || !id))
+		return;
 	read_lock(&card->ctl_files_rwlock);
 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 	card->mixer_oss_change_count++;
@@ -188,8 +189,8 @@ static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
 	struct snd_kcontrol *kctl;
 	unsigned int idx;
 	
-	snd_assert(control != NULL, return NULL);
-	snd_assert(control->count > 0, return NULL);
+	if (snd_BUG_ON(!control || !control->count))
+		return NULL;
 	kctl = kzalloc(sizeof(*kctl) + sizeof(struct snd_kcontrol_volatile) * control->count, GFP_KERNEL);
 	if (kctl == NULL) {
 		snd_printk(KERN_ERR "Cannot allocate control instance\n");
@@ -218,8 +219,8 @@ struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol,
 	struct snd_kcontrol kctl;
 	unsigned int access;
 	
-	snd_assert(ncontrol != NULL, return NULL);
-	snd_assert(ncontrol->info != NULL, return NULL);
+	if (snd_BUG_ON(!ncontrol || !ncontrol->info))
+		return NULL;
 	memset(&kctl, 0, sizeof(kctl));
 	kctl.id.iface = ncontrol->iface;
 	kctl.id.device = ncontrol->device;
@@ -315,8 +316,8 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
 
 	if (! kcontrol)
 		return err;
-	snd_assert(card != NULL, goto error);
-	snd_assert(kcontrol->info != NULL, goto error);
+	if (snd_BUG_ON(!card || !kcontrol->info))
+		goto error;
 	id = kcontrol->id;
 	down_write(&card->controls_rwsem);
 	if (snd_ctl_find_id(card, &id)) {
@@ -367,7 +368,8 @@ int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol)
 	struct snd_ctl_elem_id id;
 	unsigned int idx;
 
-	snd_assert(card != NULL && kcontrol != NULL, return -EINVAL);
+	if (snd_BUG_ON(!card || !kcontrol))
+		return -EINVAL;
 	list_del(&kcontrol->list);
 	card->controls_count -= kcontrol->count;
 	id = kcontrol->id;
@@ -487,7 +489,8 @@ struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numi
 {
 	struct snd_kcontrol *kctl;
 
-	snd_assert(card != NULL && numid != 0, return NULL);
+	if (snd_BUG_ON(!card || !numid))
+		return NULL;
 	list_for_each_entry(kctl, &card->controls, list) {
 		if (kctl->id.numid <= numid && kctl->id.numid + kctl->count > numid)
 			return kctl;
@@ -514,7 +517,8 @@ struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
 {
 	struct snd_kcontrol *kctl;
 
-	snd_assert(card != NULL && id != NULL, return NULL);
+	if (snd_BUG_ON(!card || !id))
+		return NULL;
 	if (id->numid != 0)
 		return snd_ctl_find_numid(card, id->numid);
 	list_for_each_entry(kctl, &card->controls, list) {
@@ -647,7 +651,7 @@ static int snd_ctl_elem_info(struct snd_ctl_file *ctl,
 #endif
 	result = kctl->info(kctl, info);
 	if (result >= 0) {
-		snd_assert(info->access == 0, );
+		snd_BUG_ON(info->access);
 		index_offset = snd_ctl_get_ioff(kctl, &info->id);
 		vd = &kctl->vd[index_offset];
 		snd_ctl_build_ioff(&info->id, kctl, index_offset);
@@ -1160,7 +1164,8 @@ static long snd_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 
 	ctl = file->private_data;
 	card = ctl->card;
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	switch (cmd) {
 	case SNDRV_CTL_IOCTL_PVERSION:
 		return put_user(SNDRV_CTL_VERSION, ip) ? -EFAULT : 0;
@@ -1222,7 +1227,8 @@ static ssize_t snd_ctl_read(struct file *file, char __user *buffer,
 	ssize_t result = 0;
 
 	ctl = file->private_data;
-	snd_assert(ctl != NULL && ctl->card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!ctl || !ctl->card))
+		return -ENXIO;
 	if (!ctl->subscribed)
 		return -EBADFD;
 	if (count < sizeof(struct snd_ctl_event))
@@ -1328,7 +1334,8 @@ static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn,
 {
 	struct snd_kctl_ioctl *p;
 
-	snd_assert(fcn != NULL, return -EINVAL);
+	if (snd_BUG_ON(!fcn))
+		return -EINVAL;
 	down_write(&snd_ioctl_rwsem);
 	list_for_each_entry(p, lists, list) {
 		if (p->fioctl == fcn) {
@@ -1404,9 +1411,11 @@ static int snd_ctl_dev_register(struct snd_device *device)
 	int err, cardnum;
 	char name[16];
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	cardnum = card->number;
-	snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
+	if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
+		return -ENXIO;
 	sprintf(name, "controlC%i", cardnum);
 	if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,
 				       &snd_ctl_f_ops, card, name)) < 0)
@@ -1423,16 +1432,18 @@ static int snd_ctl_dev_disconnect(struct snd_device *device)
 	struct snd_ctl_file *ctl;
 	int err, cardnum;
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	cardnum = card->number;
-	snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
+	if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
+		return -ENXIO;
 
-	down_read(&card->controls_rwsem);
+	read_lock(&card->ctl_files_rwlock);
 	list_for_each_entry(ctl, &card->ctl_files, list) {
 		wake_up(&ctl->change_sleep);
 		kill_fasync(&ctl->fasync, SIGIO, POLL_ERR);
 	}
-	up_read(&card->controls_rwsem);
+	read_unlock(&card->ctl_files_rwlock);
 
 	if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL,
 					 card, -1)) < 0)
@@ -1469,7 +1480,8 @@ int snd_ctl_create(struct snd_card *card)
 		.dev_disconnect = snd_ctl_dev_disconnect,
 	};
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
 }
 
diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c
index 6101259ad86..368dc9c4aef 100644
--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -398,7 +398,8 @@ static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, uns
 	int err;
 
 	ctl = file->private_data;
-	snd_assert(ctl && ctl->card, return -ENXIO);
+	if (snd_BUG_ON(!ctl || !ctl->card))
+		return -ENXIO;
 
 	switch (cmd) {
 	case SNDRV_CTL_IOCTL_PVERSION:
diff --git a/sound/core/device.c b/sound/core/device.c
index 202dac0e4d8..c58d8227254 100644
--- a/sound/core/device.c
+++ b/sound/core/device.c
@@ -45,9 +45,8 @@ int snd_device_new(struct snd_card *card, snd_device_type_t type,
 {
 	struct snd_device *dev;
 
-	snd_assert(card != NULL, return -ENXIO);
-	snd_assert(device_data != NULL, return -ENXIO);
-	snd_assert(ops != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card || !device_data || !ops))
+		return -ENXIO;
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (dev == NULL) {
 		snd_printk(KERN_ERR "Cannot allocate device\n");
@@ -80,8 +79,8 @@ int snd_device_free(struct snd_card *card, void *device_data)
 {
 	struct snd_device *dev;
 	
-	snd_assert(card != NULL, return -ENXIO);
-	snd_assert(device_data != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card || !device_data))
+		return -ENXIO;
 	list_for_each_entry(dev, &card->devices, list) {
 		if (dev->device_data != device_data)
 			continue;
@@ -123,8 +122,8 @@ int snd_device_disconnect(struct snd_card *card, void *device_data)
 {
 	struct snd_device *dev;
 
-	snd_assert(card != NULL, return -ENXIO);
-	snd_assert(device_data != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card || !device_data))
+		return -ENXIO;
 	list_for_each_entry(dev, &card->devices, list) {
 		if (dev->device_data != device_data)
 			continue;
@@ -159,8 +158,8 @@ int snd_device_register(struct snd_card *card, void *device_data)
 	struct snd_device *dev;
 	int err;
 
-	snd_assert(card != NULL, return -ENXIO);
-	snd_assert(device_data != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card || !device_data))
+		return -ENXIO;
 	list_for_each_entry(dev, &card->devices, list) {
 		if (dev->device_data != device_data)
 			continue;
@@ -188,7 +187,8 @@ int snd_device_register_all(struct snd_card *card)
 	struct snd_device *dev;
 	int err;
 	
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	list_for_each_entry(dev, &card->devices, list) {
 		if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
 			if ((err = dev->ops->dev_register(dev)) < 0)
@@ -208,7 +208,8 @@ int snd_device_disconnect_all(struct snd_card *card)
 	struct snd_device *dev;
 	int err = 0;
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	list_for_each_entry(dev, &card->devices, list) {
 		if (snd_device_disconnect(card, dev->device_data) < 0)
 			err = -ENXIO;
@@ -226,7 +227,8 @@ int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd)
 	int err;
 	unsigned int range_low, range_high;
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	range_low = cmd * SNDRV_DEV_TYPE_RANGE_SIZE;
 	range_high = range_low + SNDRV_DEV_TYPE_RANGE_SIZE - 1;
       __again:
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 6d6589f9389..195cafc5a55 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -353,9 +353,10 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device,
 		.dev_disconnect = snd_hwdep_dev_disconnect,
 	};
 
-	snd_assert(rhwdep != NULL, return -EINVAL);
-	*rhwdep = NULL;
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
+	if (rhwdep)
+		*rhwdep = NULL;
 	hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
 	if (hwdep == NULL) {
 		snd_printk(KERN_ERR "hwdep: cannot allocate\n");
@@ -374,13 +375,15 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device,
 	}
 	init_waitqueue_head(&hwdep->open_wait);
 	mutex_init(&hwdep->open_mutex);
-	*rhwdep = hwdep;
+	if (rhwdep)
+		*rhwdep = hwdep;
 	return 0;
 }
 
 static int snd_hwdep_free(struct snd_hwdep *hwdep)
 {
-	snd_assert(hwdep != NULL, return -ENXIO);
+	if (!hwdep)
+		return 0;
 	if (hwdep->private_free)
 		hwdep->private_free(hwdep);
 	kfree(hwdep);
@@ -440,7 +443,8 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device)
 {
 	struct snd_hwdep *hwdep = device->device_data;
 
-	snd_assert(hwdep != NULL, return -ENXIO);
+	if (snd_BUG_ON(!hwdep))
+		return -ENXIO;
 	mutex_lock(&register_mutex);
 	if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
 		mutex_unlock(&register_mutex);
diff --git a/sound/core/info.c b/sound/core/info.c
index c67773ad929..527b207462b 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -217,7 +217,8 @@ static ssize_t snd_info_entry_read(struct file *file, char __user *buffer,
 	loff_t pos;
 
 	data = file->private_data;
-	snd_assert(data != NULL, return -ENXIO);
+	if (snd_BUG_ON(!data))
+		return -ENXIO;
 	pos = *offset;
 	if (pos < 0 || (long) pos != pos || (ssize_t) count < 0)
 		return -EIO;
@@ -258,7 +259,8 @@ static ssize_t snd_info_entry_write(struct file *file, const char __user *buffer
 	loff_t pos;
 
 	data = file->private_data;
-	snd_assert(data != NULL, return -ENXIO);
+	if (snd_BUG_ON(!data))
+		return -ENXIO;
 	entry = data->entry;
 	pos = *offset;
 	if (pos < 0 || (long) pos != pos || (ssize_t) count < 0)
@@ -614,7 +616,8 @@ int snd_info_card_create(struct snd_card *card)
 	char str[8];
 	struct snd_info_entry *entry;
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 
 	sprintf(str, "card%i", card->number);
 	if ((entry = snd_info_create_module_entry(card->module, str, NULL)) == NULL)
@@ -636,7 +639,8 @@ int snd_info_card_register(struct snd_card *card)
 {
 	struct proc_dir_entry *p;
 
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 
 	if (!strcmp(card->id, card->proc_root->name))
 		return 0;
@@ -654,7 +658,8 @@ int snd_info_card_register(struct snd_card *card)
  */
 void snd_info_card_disconnect(struct snd_card *card)
 {
-	snd_assert(card != NULL, return);
+	if (!card)
+		return;
 	mutex_lock(&info_mutex);
 	if (card->proc_root_link) {
 		snd_remove_proc_entry(snd_proc_root, card->proc_root_link);
@@ -671,7 +676,8 @@ void snd_info_card_disconnect(struct snd_card *card)
  */
 int snd_info_card_free(struct snd_card *card)
 {
-	snd_assert(card != NULL, return -ENXIO);
+	if (!card)
+		return 0;
 	snd_info_free_entry(card->proc_root);
 	card->proc_root = NULL;
 	return 0;
@@ -849,7 +855,7 @@ static void snd_info_disconnect(struct snd_info_entry *entry)
 		return;
 	list_del_init(&entry->list);
 	root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
-	snd_assert(root, return);
+	snd_BUG_ON(!root);
 	snd_remove_proc_entry(root, entry->p);
 	entry->p = NULL;
 }
@@ -947,7 +953,8 @@ int snd_info_register(struct snd_info_entry * entry)
 {
 	struct proc_dir_entry *root, *p = NULL;
 
-	snd_assert(entry != NULL, return -ENXIO);
+	if (snd_BUG_ON(!entry))
+		return -ENXIO;
 	root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
 	mutex_lock(&info_mutex);
 	p = snd_create_proc_entry(entry->name, entry->mode, root);
diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c
index e35789a9275..e4af138d651 100644
--- a/sound/core/info_oss.c
+++ b/sound/core/info_oss.c
@@ -43,8 +43,10 @@ int snd_oss_info_register(int dev, int num, char *string)
 {
 	char *x;
 
-	snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO);
-	snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO);
+	if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
+		return -ENXIO;
+	if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
+		return -ENXIO;
 	mutex_lock(&strings);
 	if (string == NULL) {
 		if ((x = snd_sndstat_strings[num][dev]) != NULL) {
diff --git a/sound/core/init.c b/sound/core/init.c
index df46bbc25dc..8af467df924 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -545,7 +545,8 @@ int snd_card_register(struct snd_card *card)
 {
 	int err;
 
-	snd_assert(card != NULL, return -EINVAL);
+	if (snd_BUG_ON(!card))
+		return -EINVAL;
 #ifndef CONFIG_SYSFS_DEPRECATED
 	if (!card->card_dev) {
 		card->card_dev = device_create_drvdata(sound_class, card->dev,
diff --git a/sound/core/jack.c b/sound/core/jack.c
new file mode 100644
index 00000000000..8133a2b173a
--- /dev/null
+++ b/sound/core/jack.c
@@ -0,0 +1,163 @@
+/*
+ *  Jack abstraction layer
+ *
+ *  Copyright 2008 Wolfson Microelectronics
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <linux/input.h>
+#include <sound/jack.h>
+#include <sound/core.h>
+
+static int snd_jack_dev_free(struct snd_device *device)
+{
+	struct snd_jack *jack = device->device_data;
+
+	/* If the input device is registered with the input subsystem
+	 * then we need to use a different deallocator. */
+	if (jack->registered)
+		input_unregister_device(jack->input_dev);
+	else
+		input_free_device(jack->input_dev);
+
+	kfree(jack);
+
+	return 0;
+}
+
+static int snd_jack_dev_register(struct snd_device *device)
+{
+	struct snd_jack *jack = device->device_data;
+	struct snd_card *card = device->card;
+	int err;
+
+	snprintf(jack->name, sizeof(jack->name), "%s %s",
+		 card->longname, jack->id);
+	jack->input_dev->name = jack->name;
+
+	/* Default to the sound card device. */
+	if (!jack->input_dev->dev.parent)
+		jack->input_dev->dev.parent = card->dev;
+
+	err = input_register_device(jack->input_dev);
+	if (err == 0)
+		jack->registered = 1;
+
+	return err;
+}
+
+/**
+ * snd_jack_new - Create a new jack
+ * @card:  the card instance
+ * @id:    an identifying string for this jack
+ * @type:  a bitmask of enum snd_jack_type values that can be detected by
+ *         this jack
+ * @jjack: Used to provide the allocated jack object to the caller.
+ *
+ * Creates a new jack object.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ * On success jjack will be initialised.
+ */
+int snd_jack_new(struct snd_card *card, const char *id, int type,
+		 struct snd_jack **jjack)
+{
+	struct snd_jack *jack;
+	int err;
+	static struct snd_device_ops ops = {
+		.dev_free = snd_jack_dev_free,
+		.dev_register = snd_jack_dev_register,
+	};
+
+	jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
+	if (jack == NULL)
+		return -ENOMEM;
+
+	jack->id = id;
+
+	jack->input_dev = input_allocate_device();
+	if (jack->input_dev == NULL) {
+		err = -ENOMEM;
+		goto fail_input;
+	}
+
+	jack->input_dev->phys = "ALSA";
+
+	jack->type = type;
+
+	if (type & SND_JACK_HEADPHONE)
+		input_set_capability(jack->input_dev, EV_SW,
+				     SW_HEADPHONE_INSERT);
+	if (type & SND_JACK_MICROPHONE)
+		input_set_capability(jack->input_dev, EV_SW,
+				     SW_MICROPHONE_INSERT);
+
+	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
+	if (err < 0)
+		goto fail_input;
+
+	*jjack = jack;
+
+	return 0;
+
+fail_input:
+	input_free_device(jack->input_dev);
+	kfree(jack);
+	return err;
+}
+EXPORT_SYMBOL(snd_jack_new);
+
+/**
+ * snd_jack_set_parent - Set the parent device for a jack
+ *
+ * @jack:   The jack to configure
+ * @parent: The device to set as parent for the jack.
+ *
+ * Set the parent for the jack input device in the device tree.  This
+ * function is only valid prior to registration of the jack.  If no
+ * parent is configured then the parent device will be the sound card.
+ */
+void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
+{
+	WARN_ON(jack->registered);
+
+	jack->input_dev->dev.parent = parent;
+}
+EXPORT_SYMBOL(snd_jack_set_parent);
+
+/**
+ * snd_jack_report - Report the current status of a jack
+ *
+ * @jack:   The jack to report status for
+ * @status: The current status of the jack
+ */
+void snd_jack_report(struct snd_jack *jack, int status)
+{
+	if (jack->type & SND_JACK_HEADPHONE)
+		input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
+				    status & SND_JACK_HEADPHONE);
+	if (jack->type & SND_JACK_MICROPHONE)
+		input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
+				    status & SND_JACK_MICROPHONE);
+
+	input_sync(jack->input_dev);
+}
+EXPORT_SYMBOL(snd_jack_report);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("Jack detection support for ALSA");
+MODULE_LICENSE("GPL");
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index f5d6d8d1297..a7b46ec72f3 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -46,14 +46,6 @@ MODULE_LICENSE("GPL");
 /*
  */
 
-void *snd_malloc_sgbuf_pages(struct device *device,
-                             size_t size, struct snd_dma_buffer *dmab,
-			     size_t *res_size);
-int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
-
-/*
- */
-
 static DEFINE_MUTEX(list_mutex);
 static LIST_HEAD(mem_list_head);
 
@@ -67,18 +59,6 @@ struct snd_mem_list {
 /* id for pre-allocated buffers */
 #define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1
 
-#ifdef CONFIG_SND_DEBUG
-#define __ASTRING__(x) #x
-#define snd_assert(expr, args...) do {\
-	if (!(expr)) {\
-		printk(KERN_ERR "snd-malloc: BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
-		args;\
-	}\
-} while (0)
-#else
-#define snd_assert(expr, args...) /**/
-#endif
-
 /*
  *
  *  Generic memory allocators
@@ -111,8 +91,10 @@ void *snd_malloc_pages(size_t size, gfp_t gfp_flags)
 	int pg;
 	void *res;
 
-	snd_assert(size > 0, return NULL);
-	snd_assert(gfp_flags != 0, return NULL);
+	if (WARN_ON(!size))
+		return NULL;
+	if (WARN_ON(!gfp_flags))
+		return NULL;
 	gfp_flags |= __GFP_COMP;	/* compound page lets parts be mapped */
 	pg = get_order(size);
 	if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL)
@@ -152,8 +134,8 @@ static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *d
 	void *res;
 	gfp_t gfp_flags;
 
-	snd_assert(size > 0, return NULL);
-	snd_assert(dma != NULL, return NULL);
+	if (WARN_ON(!dma))
+		return NULL;
 	pg = get_order(size);
 	gfp_flags = GFP_KERNEL
 		| __GFP_COMP	/* compound page lets parts be mapped */
@@ -189,8 +171,8 @@ static void *snd_malloc_sbus_pages(struct device *dev, size_t size,
 	int pg;
 	void *res;
 
-	snd_assert(size > 0, return NULL);
-	snd_assert(dma_addr != NULL, return NULL);
+	if (WARN_ON(!dma_addr))
+		return NULL;
 	pg = get_order(size);
 	res = sbus_alloc_consistent(sdev, PAGE_SIZE * (1 << pg), dma_addr);
 	if (res != NULL)
@@ -236,8 +218,10 @@ static void snd_free_sbus_pages(struct device *dev, size_t size,
 int snd_dma_alloc_pages(int type, struct device *device, size_t size,
 			struct snd_dma_buffer *dmab)
 {
-	snd_assert(size > 0, return -ENXIO);
-	snd_assert(dmab != NULL, return -ENXIO);
+	if (WARN_ON(!size))
+		return -ENXIO;
+	if (WARN_ON(!dmab))
+		return -ENXIO;
 
 	dmab->dev.type = type;
 	dmab->dev.dev = device;
@@ -292,15 +276,17 @@ int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size,
 {
 	int err;
 
-	snd_assert(size > 0, return -ENXIO);
-	snd_assert(dmab != NULL, return -ENXIO);
-
 	while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) {
+		size_t aligned_size;
 		if (err != -ENOMEM)
 			return err;
-		size >>= 1;
 		if (size <= PAGE_SIZE)
 			return -ENOMEM;
+		aligned_size = PAGE_SIZE << get_order(size);
+		if (size != aligned_size)
+			size = aligned_size;
+		else
+			size >>= 1;
 	}
 	if (! dmab->area)
 		return -ENOMEM;
@@ -353,7 +339,8 @@ size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id)
 {
 	struct snd_mem_list *mem;
 
-	snd_assert(dmab, return 0);
+	if (WARN_ON(!dmab))
+		return 0;
 
 	mutex_lock(&list_mutex);
 	list_for_each_entry(mem, &mem_list_head, list) {
@@ -387,7 +374,8 @@ int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id)
 {
 	struct snd_mem_list *mem;
 
-	snd_assert(dmab, return -EINVAL);
+	if (WARN_ON(!dmab))
+		return -EINVAL;
 	mem = kmalloc(sizeof(*mem), GFP_KERNEL);
 	if (! mem)
 		return -ENOMEM;
diff --git a/sound/core/oss/copy.c b/sound/core/oss/copy.c
index 9ded30d0e97..05b58d4fc2b 100644
--- a/sound/core/oss/copy.c
+++ b/sound/core/oss/copy.c
@@ -32,17 +32,18 @@ static snd_pcm_sframes_t copy_transfer(struct snd_pcm_plugin *plugin,
 	unsigned int channel;
 	unsigned int nchannels;
 
-	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 	nchannels = plugin->src_format.channels;
 	for (channel = 0; channel < nchannels; channel++) {
-		snd_assert(src_channels->area.first % 8 == 0 &&
-			   src_channels->area.step % 8 == 0,
-			   return -ENXIO);
-		snd_assert(dst_channels->area.first % 8 == 0 &&
-			   dst_channels->area.step % 8 == 0,
-			   return -ENXIO);
+		if (snd_BUG_ON(src_channels->area.first % 8 ||
+			       src_channels->area.step % 8))
+			return -ENXIO;
+		if (snd_BUG_ON(dst_channels->area.first % 8 ||
+			       dst_channels->area.step % 8))
+			return -ENXIO;
 		if (!src_channels->enabled) {
 			if (dst_channels->wanted)
 				snd_pcm_area_silence(&dst_channels->area, 0, frames, plugin->dst_format.format);
@@ -66,15 +67,20 @@ int snd_pcm_plugin_build_copy(struct snd_pcm_substream *plug,
 	struct snd_pcm_plugin *plugin;
 	int width;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
 
-	snd_assert(src_format->format == dst_format->format, return -ENXIO);
-	snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-	snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
+	if (snd_BUG_ON(src_format->format != dst_format->format))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->rate != dst_format->rate))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->channels != dst_format->channels))
+		return -ENXIO;
 
 	width = snd_pcm_format_physical_width(src_format->format);
-	snd_assert(width > 0, return -ENXIO);
+	if (snd_BUG_ON(width <= 0))
+		return -ENXIO;
 
 	err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
 				   0, &plugin);
diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
index f874f6ca365..6faa1d71920 100644
--- a/sound/core/oss/io.c
+++ b/sound/core/oss/io.c
@@ -39,14 +39,17 @@ static snd_pcm_sframes_t io_playback_transfer(struct snd_pcm_plugin *plugin,
 				    struct snd_pcm_plugin_channel *dst_channels,
 				    snd_pcm_uframes_t frames)
 {
-	snd_assert(plugin != NULL, return -ENXIO);
-	snd_assert(src_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin))
+		return -ENXIO;
+	if (snd_BUG_ON(!src_channels))
+		return -ENXIO;
 	if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
 		return pcm_write(plugin->plug, src_channels->area.addr, frames);
 	} else {
 		int channel, channels = plugin->dst_format.channels;
 		void **bufs = (void**)plugin->extra_data;
-		snd_assert(bufs != NULL, return -ENXIO);
+		if (snd_BUG_ON(!bufs))
+			return -ENXIO;
 		for (channel = 0; channel < channels; channel++) {
 			if (src_channels[channel].enabled)
 				bufs[channel] = src_channels[channel].area.addr;
@@ -62,14 +65,17 @@ static snd_pcm_sframes_t io_capture_transfer(struct snd_pcm_plugin *plugin,
 				   struct snd_pcm_plugin_channel *dst_channels,
 				   snd_pcm_uframes_t frames)
 {
-	snd_assert(plugin != NULL, return -ENXIO);
-	snd_assert(dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin))
+		return -ENXIO;
+	if (snd_BUG_ON(!dst_channels))
+		return -ENXIO;
 	if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
 		return pcm_read(plugin->plug, dst_channels->area.addr, frames);
 	} else {
 		int channel, channels = plugin->dst_format.channels;
 		void **bufs = (void**)plugin->extra_data;
-		snd_assert(bufs != NULL, return -ENXIO);
+		if (snd_BUG_ON(!bufs))
+			return -ENXIO;
 		for (channel = 0; channel < channels; channel++) {
 			if (dst_channels[channel].enabled)
 				bufs[channel] = dst_channels[channel].area.addr;
@@ -107,9 +113,11 @@ int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug,
 	struct snd_pcm_plugin_format format;
 	struct snd_pcm_plugin *plugin;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
-	snd_assert(plug != NULL && params != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plug || !params))
+		return -ENXIO;
 	format.format = params_format(params);
 	format.rate = params_rate(params);
 	format.channels = params_channels(params);
diff --git a/sound/core/oss/linear.c b/sound/core/oss/linear.c
index da3dbd41669..4c1d1682719 100644
--- a/sound/core/oss/linear.c
+++ b/sound/core/oss/linear.c
@@ -92,7 +92,8 @@ static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
 {
 	struct linear_priv *data;
 
-	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+		return -ENXIO;
 	data = (struct linear_priv *)plugin->extra_data;
 	if (frames == 0)
 		return 0;
@@ -100,12 +101,12 @@ static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
 	{
 		unsigned int channel;
 		for (channel = 0; channel < plugin->src_format.channels; channel++) {
-			snd_assert(src_channels[channel].area.first % 8 == 0 &&
-				   src_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
-			snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-				   dst_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
+			if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+				       src_channels[channel].area.step % 8))
+				return -ENXIO;
+			if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+				       dst_channels[channel].area.step % 8))
+				return -ENXIO;
 		}
 	}
 #endif
@@ -154,13 +155,17 @@ int snd_pcm_plugin_build_linear(struct snd_pcm_substream *plug,
 	struct linear_priv *data;
 	struct snd_pcm_plugin *plugin;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
 
-	snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-	snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
-	snd_assert(snd_pcm_format_linear(src_format->format) &&
-		   snd_pcm_format_linear(dst_format->format), return -ENXIO);
+	if (snd_BUG_ON(src_format->rate != dst_format->rate))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->channels != dst_format->channels))
+		return -ENXIO;
+	if (snd_BUG_ON(!snd_pcm_format_linear(src_format->format) ||
+		       !snd_pcm_format_linear(dst_format->format)))
+		return -ENXIO;
 
 	err = snd_pcm_plugin_build(plug, "linear format conversion",
 				   src_format, dst_format,
diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c
index 581aa2c60e6..4690b8b5681 100644
--- a/sound/core/oss/mixer_oss.c
+++ b/sound/core/oss/mixer_oss.c
@@ -257,8 +257,10 @@ static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
 		result = pslot->get_volume(fmixer, pslot, &left, &right);
 	if (!pslot->stereo)
 		right = left;
-	snd_assert(left >= 0 && left <= 100, return -EIO);
-	snd_assert(right >= 0 && right <= 100, return -EIO);
+	if (snd_BUG_ON(left < 0 || left > 100))
+		return -EIO;
+	if (snd_BUG_ON(right < 0 || right > 100))
+		return -EIO;
 	if (result >= 0) {
 		pslot->volume[0] = left;
 		pslot->volume[1] = right;
@@ -298,7 +300,8 @@ static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int
 	int __user *p = argp;
 	int tmp;
 
-	snd_assert(fmixer != NULL, return -ENXIO);
+	if (snd_BUG_ON(!fmixer))
+		return -ENXIO;
 	if (((cmd >> 8) & 0xff) == 'M') {
 		switch (cmd) {
 		case SOUND_MIXER_INFO:
@@ -368,7 +371,8 @@ int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned l
 {
 	struct snd_mixer_oss_file fmixer;
 	
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
 	if (card->mixer_oss == NULL)
 		return -ENXIO;
 	memset(&fmixer, 0, sizeof(fmixer));
@@ -1284,9 +1288,11 @@ static int snd_mixer_oss_free1(void *private)
 	struct snd_card *card;
 	int idx;
  
-	snd_assert(mixer != NULL, return -ENXIO);
+	if (!mixer)
+		return 0;
 	card = mixer->card;
-	snd_assert(mixer == card->mixer_oss, return -ENXIO);
+	if (snd_BUG_ON(mixer != card->mixer_oss))
+		return -ENXIO;
 	card->mixer_oss = NULL;
 	for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
 		struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
diff --git a/sound/core/oss/mulaw.c b/sound/core/oss/mulaw.c
index 77f96194a0e..f7649d4d950 100644
--- a/sound/core/oss/mulaw.c
+++ b/sound/core/oss/mulaw.c
@@ -252,19 +252,20 @@ static snd_pcm_sframes_t mulaw_transfer(struct snd_pcm_plugin *plugin,
 {
 	struct mulaw_priv *data;
 
-	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 #ifdef CONFIG_SND_DEBUG
 	{
 		unsigned int channel;
 		for (channel = 0; channel < plugin->src_format.channels; channel++) {
-			snd_assert(src_channels[channel].area.first % 8 == 0 &&
-				   src_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
-			snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-				   dst_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
+			if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+				       src_channels[channel].area.step % 8))
+				return -ENXIO;
+			if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+				       dst_channels[channel].area.step % 8))
+				return -ENXIO;
 		}
 	}
 #endif
@@ -305,11 +306,14 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
 	struct snd_pcm_plugin_format *format;
 	mulaw_f func;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
 
-	snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-	snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
+	if (snd_BUG_ON(src_format->rate != dst_format->rate))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->channels != dst_format->channels))
+		return -ENXIO;
 
 	if (dst_format->format == SNDRV_PCM_FORMAT_MU_LAW) {
 		format = src_format;
@@ -323,7 +327,8 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
 		snd_BUG();
 		return -EINVAL;
 	}
-	snd_assert(snd_pcm_format_linear(format->format) != 0, return -ENXIO);
+	if (snd_BUG_ON(!snd_pcm_format_linear(format->format)))
+		return -ENXIO;
 
 	err = snd_pcm_plugin_build(plug, "Mu-Law<->linear conversion",
 				   src_format, dst_format,
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 4c601b192dd..1af62b8b86c 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -452,7 +452,8 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 	} else {
 		*params = *save;
 		max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
-		snd_assert(max >= 0, return -EINVAL);
+		if (max < 0)
+			return max;
 		last = 1;
 	}
  _end:
@@ -461,7 +462,7 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 		v = snd_pcm_hw_param_last(pcm, params, var, dir);
 	else
 		v = snd_pcm_hw_param_first(pcm, params, var, dir);
-	snd_assert(v >= 0, return -EINVAL);
+	snd_BUG_ON(v < 0);
 	return v;
 }
 
@@ -778,7 +779,8 @@ static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 	while (oss_period_size * oss_periods > oss_buffer_size)
 		oss_period_size /= 2;
 
-	snd_assert(oss_period_size >= 16, return -EINVAL);
+	if (oss_period_size < 16)
+		return -EINVAL;
 	runtime->oss.period_bytes = oss_period_size;
 	runtime->oss.period_frames = 1;
 	runtime->oss.periods = oss_periods;
@@ -895,7 +897,8 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 		}
 	}
 	err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
-	snd_assert(err >= 0, goto failure);
+	if (err < 0)
+		goto failure;
 
 	if (direct) {
 		memcpy(params, sparams, sizeof(*params));
@@ -958,11 +961,13 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 
 	n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
-	snd_assert(err >= 0, goto failure);
+	if (err < 0)
+		goto failure;
 
 	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 				     runtime->oss.periods, NULL);
-	snd_assert(err >= 0, goto failure);
+	if (err < 0)
+		goto failure;
 
 	snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 
@@ -1006,7 +1011,10 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 
 	runtime->oss.periods = params_periods(sparams);
 	oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
-	snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
+	if (oss_period_size < 0) {
+		err = -EINVAL;
+		goto failure;
+	}
 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	if (runtime->oss.plugin_first) {
 		err = snd_pcm_plug_alloc(substream, oss_period_size);
@@ -1017,7 +1025,10 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 	oss_period_size *= oss_frame_size;
 
 	oss_buffer_size = oss_period_size * runtime->oss.periods;
-	snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
+	if (oss_buffer_size < 0) {
+		err = -EINVAL;
+		goto failure;
+	}
 
 	runtime->oss.period_bytes = oss_period_size;
 	runtime->oss.buffer_bytes = oss_buffer_size;
@@ -1069,7 +1080,8 @@ static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_fil
 				return err;
 		}
 	}
-	snd_assert(asubstream != NULL, return -EIO);
+	if (!asubstream)
+		return -EIO;
 	if (r_substream)
 		*r_substream = asubstream;
 	return 0;
@@ -1764,7 +1776,8 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
 	err = snd_pcm_hw_refine(substream, params);
 	format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
 	kfree(params);
-	snd_assert(err >= 0, return err);
+	if (err < 0)
+		return err;
 	for (fmt = 0; fmt < 32; ++fmt) {
 		if (snd_mask_test(&format_mask, fmt)) {
 			int f = snd_pcm_oss_format_to(fmt);
@@ -2250,7 +2263,8 @@ static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
 {
 	int cidx;
-	snd_assert(pcm_oss_file != NULL, return -ENXIO);
+	if (!pcm_oss_file)
+		return 0;
 	for (cidx = 0; cidx < 2; ++cidx) {
 		struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
 		if (substream)
@@ -2271,8 +2285,8 @@ static int snd_pcm_oss_open_file(struct file *file,
 	struct snd_pcm_substream *substream;
 	unsigned int f_mode = file->f_mode;
 
-	snd_assert(rpcm_oss_file != NULL, return -EINVAL);
-	*rpcm_oss_file = NULL;
+	if (rpcm_oss_file)
+		*rpcm_oss_file = NULL;
 
 	pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
 	if (pcm_oss_file == NULL)
@@ -2312,7 +2326,8 @@ static int snd_pcm_oss_open_file(struct file *file,
 	}
 
 	file->private_data = pcm_oss_file;
-	*rpcm_oss_file = pcm_oss_file;
+	if (rpcm_oss_file)
+		*rpcm_oss_file = pcm_oss_file;
 	return 0;
 }
 
@@ -2321,7 +2336,8 @@ static int snd_task_name(struct task_struct *task, char *name, size_t size)
 {
 	unsigned int idx;
 
-	snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
+	if (snd_BUG_ON(!task || !name || size < 2))
+		return -EINVAL;
 	for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
 		name[idx] = task->comm[idx];
 	name[idx] = '\0';
@@ -2415,7 +2431,8 @@ static int snd_pcm_oss_release(struct inode *inode, struct file *file)
 	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 	if (substream == NULL)
 		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
-	snd_assert(substream != NULL, return -ENXIO);
+	if (snd_BUG_ON(!substream))
+		return -ENXIO;
 	pcm = substream->pcm;
 	if (!pcm->card->shutdown)
 		snd_pcm_oss_sync(pcm_oss_file);
@@ -2448,7 +2465,8 @@ static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long
 			if (substream != NULL)
 				break;
 		}
-		snd_assert(substream != NULL, return -ENXIO);
+		if (snd_BUG_ON(idx >= 2))
+			return -ENXIO;
 		return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
 	}
 #endif
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index bec94138205..6751daa3bb5 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -62,7 +62,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
 	if ((width = snd_pcm_format_physical_width(format->format)) < 0)
 		return width;
 	size = frames * format->channels * width;
-	snd_assert((size % 8) == 0, return -ENXIO);
+	if (snd_BUG_ON(size % 8))
+		return -ENXIO;
 	size /= 8;
 	if (plugin->buf_frames < frames) {
 		vfree(plugin->buf);
@@ -84,7 +85,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
 			c->area.step = format->channels * width;
 		}
 	} else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
-		snd_assert((size % format->channels) == 0,);
+		if (snd_BUG_ON(size % format->channels))
+			return -EINVAL;
 		size /= format->channels;
 		for (channel = 0; channel < format->channels; channel++, c++) {
 			c->frames = frames;
@@ -102,13 +104,15 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
 int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
 {
 	int err;
-	snd_assert(snd_pcm_plug_first(plug) != NULL, return -ENXIO);
+	if (snd_BUG_ON(!snd_pcm_plug_first(plug)))
+		return -ENXIO;
 	if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
 		struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug);
 		while (plugin->next) {
 			if (plugin->dst_frames)
 				frames = plugin->dst_frames(plugin, frames);
-			snd_assert(frames > 0, return -ENXIO);
+			if (snd_BUG_ON(frames <= 0))
+				return -ENXIO;
 			plugin = plugin->next;
 			err = snd_pcm_plugin_alloc(plugin, frames);
 			if (err < 0)
@@ -119,7 +123,8 @@ int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
 		while (plugin->prev) {
 			if (plugin->src_frames)
 				frames = plugin->src_frames(plugin, frames);
-			snd_assert(frames > 0, return -ENXIO);
+			if (snd_BUG_ON(frames <= 0))
+				return -ENXIO;
 			plugin = plugin->prev;
 			err = snd_pcm_plugin_alloc(plugin, frames);
 			if (err < 0)
@@ -148,8 +153,10 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
 	struct snd_pcm_plugin *plugin;
 	unsigned int channels;
 	
-	snd_assert(plug != NULL, return -ENXIO);
-	snd_assert(src_format != NULL && dst_format != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plug))
+		return -ENXIO;
+	if (snd_BUG_ON(!src_format || !dst_format))
+		return -ENXIO;
 	plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL);
 	if (plugin == NULL)
 		return -ENOMEM;
@@ -159,10 +166,10 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
 	plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
 	plugin->src_format = *src_format;
 	plugin->src_width = snd_pcm_format_physical_width(src_format->format);
-	snd_assert(plugin->src_width > 0, );
+	snd_BUG_ON(plugin->src_width <= 0);
 	plugin->dst_format = *dst_format;
 	plugin->dst_width = snd_pcm_format_physical_width(dst_format->format);
-	snd_assert(plugin->dst_width > 0, );
+	snd_BUG_ON(plugin->dst_width <= 0);
 	if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		channels = src_format->channels;
 	else
@@ -194,7 +201,8 @@ snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_p
 	struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next;
 	int stream = snd_pcm_plug_stream(plug);
 
-	snd_assert(plug != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plug))
+		return -ENXIO;
 	if (drv_frames == 0)
 		return 0;
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -224,7 +232,8 @@ snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pc
 	snd_pcm_sframes_t frames;
 	int stream = snd_pcm_plug_stream(plug);
 	
-	snd_assert(plug != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plug))
+		return -ENXIO;
 	if (clt_frames == 0)
 		return 0;
 	frames = clt_frames;
@@ -540,7 +549,8 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plu
 	int width, nchannels, channel;
 	int stream = snd_pcm_plug_stream(plug);
 
-	snd_assert(buf != NULL, return -ENXIO);
+	if (snd_BUG_ON(!buf))
+		return -ENXIO;
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		plugin = snd_pcm_plug_first(plug);
 		format = &plugin->src_format;
@@ -553,7 +563,9 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plu
 	if ((width = snd_pcm_format_physical_width(format->format)) < 0)
 		return width;
 	nchannels = format->channels;
-	snd_assert(plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || format->channels <= 1, return -ENXIO);
+	if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
+		       format->channels > 1))
+		return -ENXIO;
 	for (channel = 0; channel < nchannels; channel++, v++) {
 		v->frames = count;
 		v->enabled = 1;
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 14dfb3175d8..a466443c4a2 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -185,7 +185,8 @@ static snd_pcm_sframes_t rate_src_frames(struct snd_pcm_plugin *plugin, snd_pcm_
 	struct rate_priv *data;
 	snd_pcm_sframes_t res;
 
-	snd_assert(plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 	data = (struct rate_priv *)plugin->extra_data;
@@ -217,7 +218,8 @@ static snd_pcm_sframes_t rate_dst_frames(struct snd_pcm_plugin *plugin, snd_pcm_
 	struct rate_priv *data;
 	snd_pcm_sframes_t res;
 
-	snd_assert(plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 	data = (struct rate_priv *)plugin->extra_data;
@@ -252,19 +254,20 @@ static snd_pcm_sframes_t rate_transfer(struct snd_pcm_plugin *plugin,
 	snd_pcm_uframes_t dst_frames;
 	struct rate_priv *data;
 
-	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 #ifdef CONFIG_SND_DEBUG
 	{
 		unsigned int channel;
 		for (channel = 0; channel < plugin->src_format.channels; channel++) {
-			snd_assert(src_channels[channel].area.first % 8 == 0 &&
-				   src_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
-			snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-				   dst_channels[channel].area.step % 8 == 0,
-				   return -ENXIO);
+			if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+				       src_channels[channel].area.step % 8))
+				return -ENXIO;
+			if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+				       dst_channels[channel].area.step % 8))
+				return -ENXIO;
 		}
 	}
 #endif
@@ -281,7 +284,8 @@ static int rate_action(struct snd_pcm_plugin *plugin,
 		       enum snd_pcm_plugin_action action,
 		       unsigned long udata)
 {
-	snd_assert(plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin))
+		return -ENXIO;
 	switch (action) {
 	case INIT:
 	case PREPARE:
@@ -302,14 +306,20 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
 	struct rate_priv *data;
 	struct snd_pcm_plugin *plugin;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
 
-	snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
-	snd_assert(src_format->channels > 0, return -ENXIO);
-	snd_assert(src_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
-	snd_assert(dst_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
-	snd_assert(src_format->rate != dst_format->rate, return -ENXIO);
+	if (snd_BUG_ON(src_format->channels != dst_format->channels))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->channels <= 0))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->format != SNDRV_PCM_FORMAT_S16))
+		return -ENXIO;
+	if (snd_BUG_ON(dst_format->format != SNDRV_PCM_FORMAT_S16))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->rate == dst_format->rate))
+		return -ENXIO;
 
 	err = snd_pcm_plugin_build(plug, "rate conversion",
 				   src_format, dst_format,
diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
index da7ab7a3e82..0dcc2870d53 100644
--- a/sound/core/oss/route.c
+++ b/sound/core/oss/route.c
@@ -54,7 +54,8 @@ static snd_pcm_sframes_t route_transfer(struct snd_pcm_plugin *plugin,
 	struct snd_pcm_plugin_channel *dvp;
 	int format;
 
-	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+		return -ENXIO;
 	if (frames == 0)
 		return 0;
 
@@ -90,10 +91,13 @@ int snd_pcm_plugin_build_route(struct snd_pcm_substream *plug,
 	struct snd_pcm_plugin *plugin;
 	int err;
 
-	snd_assert(r_plugin != NULL, return -ENXIO);
+	if (snd_BUG_ON(!r_plugin))
+		return -ENXIO;
 	*r_plugin = NULL;
-	snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-	snd_assert(src_format->format == dst_format->format, return -ENXIO);
+	if (snd_BUG_ON(src_format->rate != dst_format->rate))
+		return -ENXIO;
+	if (snd_BUG_ON(src_format->format != dst_format->format))
+		return -ENXIO;
 
 	err = snd_pcm_plugin_build(plug, "route conversion",
 				   src_format, dst_format, 0, &plugin);
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 9dd9bc73fe1..192a433a240 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -42,7 +42,7 @@ static int snd_pcm_dev_free(struct snd_device *device);
 static int snd_pcm_dev_register(struct snd_device *device);
 static int snd_pcm_dev_disconnect(struct snd_device *device);
 
-static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
+static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
 {
 	struct snd_pcm *pcm;
 
@@ -53,6 +53,37 @@ static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
 	return NULL;
 }
 
+static int snd_pcm_next(struct snd_card *card, int device)
+{
+	struct snd_pcm *pcm;
+
+	list_for_each_entry(pcm, &snd_pcm_devices, list) {
+		if (pcm->card == card && pcm->device > device)
+			return pcm->device;
+		else if (pcm->card->number > card->number)
+			return -1;
+	}
+	return -1;
+}
+
+static int snd_pcm_add(struct snd_pcm *newpcm)
+{
+	struct snd_pcm *pcm;
+
+	list_for_each_entry(pcm, &snd_pcm_devices, list) {
+		if (pcm->card == newpcm->card && pcm->device == newpcm->device)
+			return -EBUSY;
+		if (pcm->card->number > newpcm->card->number ||
+				(pcm->card == newpcm->card &&
+				pcm->device > newpcm->device)) {
+			list_add(&newpcm->list, pcm->list.prev);
+			return 0;
+		}
+	}
+	list_add_tail(&newpcm->list, &snd_pcm_devices);
+	return 0;
+}
+
 static int snd_pcm_control_ioctl(struct snd_card *card,
 				 struct snd_ctl_file *control,
 				 unsigned int cmd, unsigned long arg)
@@ -65,14 +96,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
 			if (get_user(device, (int __user *)arg))
 				return -EFAULT;
 			mutex_lock(&register_mutex);
-			device = device < 0 ? 0 : device + 1;
-			while (device < SNDRV_PCM_DEVICES) {
-				if (snd_pcm_search(card, device))
-					break;
-				device++;
-			}
-			if (device == SNDRV_PCM_DEVICES)
-				device = -1;
+			device = snd_pcm_next(card, device);
 			mutex_unlock(&register_mutex);
 			if (put_user(device, (int __user *)arg))
 				return -EFAULT;
@@ -98,7 +122,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
 			if (get_user(subdevice, &info->subdevice))
 				return -EFAULT;
 			mutex_lock(&register_mutex);
-			pcm = snd_pcm_search(card, device);
+			pcm = snd_pcm_get(card, device);
 			if (pcm == NULL) {
 				err = -ENXIO;
 				goto _error;
@@ -232,7 +256,6 @@ static char *snd_pcm_tstamp_mode_names[] = {
 
 static const char *snd_pcm_stream_name(int stream)
 {
-	snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL);
 	return snd_pcm_stream_names[stream];
 }
 
@@ -248,7 +271,6 @@ static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
 
 static const char *snd_pcm_tstamp_mode_name(int mode)
 {
-	snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL);
 	return snd_pcm_tstamp_mode_names[mode];
 }
 
@@ -682,9 +704,10 @@ int snd_pcm_new(struct snd_card *card, char *id, int device,
 		.dev_disconnect = snd_pcm_dev_disconnect,
 	};
 
-	snd_assert(rpcm != NULL, return -EINVAL);
-	*rpcm = NULL;
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
+	if (rpcm)
+		*rpcm = NULL;
 	pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 	if (pcm == NULL) {
 		snd_printk(KERN_ERR "Cannot allocate PCM\n");
@@ -708,7 +731,8 @@ int snd_pcm_new(struct snd_card *card, char *id, int device,
 		snd_pcm_free(pcm);
 		return err;
 	}
-	*rpcm = pcm;
+	if (rpcm)
+		*rpcm = pcm;
 	return 0;
 }
 
@@ -742,7 +766,8 @@ static int snd_pcm_free(struct snd_pcm *pcm)
 {
 	struct snd_pcm_notify *notify;
 
-	snd_assert(pcm != NULL, return -ENXIO);
+	if (!pcm)
+		return 0;
 	list_for_each_entry(notify, &snd_pcm_notify_list, list) {
 		notify->n_unregister(pcm);
 	}
@@ -773,15 +798,15 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
 	int prefer_subdevice = -1;
 	size_t size;
 
-	snd_assert(rsubstream != NULL, return -EINVAL);
+	if (snd_BUG_ON(!pcm || !rsubstream))
+		return -ENXIO;
 	*rsubstream = NULL;
-	snd_assert(pcm != NULL, return -ENXIO);
 	pstr = &pcm->streams[stream];
 	if (pstr->substream == NULL || pstr->substream_count == 0)
 		return -ENODEV;
 
 	card = pcm->card;
-	down_read(&card->controls_rwsem);
+	read_lock(&card->ctl_files_rwlock);
 	list_for_each_entry(kctl, &card->ctl_files, list) {
 		if (kctl->pid == current->pid) {
 			prefer_subdevice = kctl->prefer_pcm_subdevice;
@@ -789,7 +814,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
 				break;
 		}
 	}
-	up_read(&card->controls_rwsem);
+	read_unlock(&card->ctl_files_rwlock);
 
 	switch (stream) {
 	case SNDRV_PCM_STREAM_PLAYBACK:
@@ -883,8 +908,9 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime;
 
+	if (PCM_RUNTIME_CHECK(substream))
+		return;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return);
 	if (runtime->private_free != NULL)
 		runtime->private_free(runtime);
 	snd_free_pages((void*)runtime->status,
@@ -929,13 +955,14 @@ static int snd_pcm_dev_register(struct snd_device *device)
 	struct snd_pcm *pcm = device->device_data;
 	struct device *dev;
 
-	snd_assert(pcm != NULL && device != NULL, return -ENXIO);
+	if (snd_BUG_ON(!pcm || !device))
+		return -ENXIO;
 	mutex_lock(&register_mutex);
-	if (snd_pcm_search(pcm->card, pcm->device)) {
+	err = snd_pcm_add(pcm);
+	if (err) {
 		mutex_unlock(&register_mutex);
-		return -EBUSY;
+		return err;
 	}
-	list_add_tail(&pcm->list, &snd_pcm_devices);
 	for (cidx = 0; cidx < 2; cidx++) {
 		int devtype = -1;
 		if (pcm->streams[cidx].substream == NULL)
@@ -1019,10 +1046,11 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
 {
 	struct snd_pcm *pcm;
 
-	snd_assert(notify != NULL &&
-		   notify->n_register != NULL &&
-		   notify->n_unregister != NULL &&
-		   notify->n_disconnect, return -EINVAL);
+	if (snd_BUG_ON(!notify ||
+		       !notify->n_register ||
+		       !notify->n_unregister ||
+		       !notify->n_disconnect))
+		return -EINVAL;
 	mutex_lock(&register_mutex);
 	if (nfree) {
 		list_del(&notify->list);
diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
index 49aa693fba8..36d7a599823 100644
--- a/sound/core/pcm_compat.c
+++ b/sound/core/pcm_compat.c
@@ -397,7 +397,8 @@ static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
 	snd_pcm_uframes_t boundary;
 	int err;
 
-	snd_assert(runtime, return -EINVAL);
+	if (snd_BUG_ON(!runtime))
+		return -EINVAL;
 
 	if (get_user(sflags, &src->flags) ||
 	    get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 1533f0379e9..6ea5cfb8399 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -85,7 +85,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
 		}
 		frames = runtime->buffer_size - runtime->silence_filled;
 	}
-	snd_assert(frames <= runtime->buffer_size, return);
+	if (snd_BUG_ON(frames > runtime->buffer_size))
+		return;
 	if (frames == 0)
 		return;
 	ofs = runtime->silence_start % runtime->buffer_size;
@@ -96,7 +97,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
 			if (substream->ops->silence) {
 				int err;
 				err = substream->ops->silence(substream, -1, ofs, transfer);
-				snd_assert(err >= 0, );
+				snd_BUG_ON(err < 0);
 			} else {
 				char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
 				snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
@@ -108,7 +109,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
 				for (c = 0; c < channels; ++c) {
 					int err;
 					err = substream->ops->silence(substream, c, ofs, transfer);
-					snd_assert(err >= 0, );
+					snd_BUG_ON(err < 0);
 				}
 			} else {
 				size_t dma_csize = runtime->dma_bytes / channels;
@@ -354,7 +355,7 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 {
 	u_int64_t n = (u_int64_t) a * b;
 	if (c == 0) {
-		snd_assert(n > 0, );
+		snd_BUG_ON(!n);
 		*r = 0;
 		return UINT_MAX;
 	}
@@ -380,7 +381,8 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
 {
 	int changed = 0;
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	if (snd_BUG_ON(snd_interval_empty(i)))
+		return -EINVAL;
 	if (i->min < v->min) {
 		i->min = v->min;
 		i->openmin = v->openmin;
@@ -423,7 +425,8 @@ EXPORT_SYMBOL(snd_interval_refine);
 
 static int snd_interval_refine_first(struct snd_interval *i)
 {
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	if (snd_BUG_ON(snd_interval_empty(i)))
+		return -EINVAL;
 	if (snd_interval_single(i))
 		return 0;
 	i->max = i->min;
@@ -435,7 +438,8 @@ static int snd_interval_refine_first(struct snd_interval *i)
 
 static int snd_interval_refine_last(struct snd_interval *i)
 {
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	if (snd_BUG_ON(snd_interval_empty(i)))
+		return -EINVAL;
 	if (snd_interval_single(i))
 		return 0;
 	i->min = i->max;
@@ -889,7 +893,8 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
 	c->private = private;
 	k = 0;
 	while (1) {
-		snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL);
+		if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps)))
+			return -EINVAL;
 		c->deps[k++] = dep;
 		if (dep < 0)
 			break;
@@ -1285,7 +1290,8 @@ int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
 		return changed;
 	if (params->rmask) {
 		int err = snd_pcm_hw_refine(pcm, params);
-		snd_assert(err >= 0, return err);
+		if (snd_BUG_ON(err < 0))
+			return err;
 	}
 	return snd_pcm_hw_param_value(params, var, dir);
 }
@@ -1330,7 +1336,8 @@ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
 		return changed;
 	if (params->rmask) {
 		int err = snd_pcm_hw_refine(pcm, params);
-		snd_assert(err >= 0, return err);
+		if (snd_BUG_ON(err < 0))
+			return err;
 	}
 	return snd_pcm_hw_param_value(params, var, dir);
 }
@@ -1368,7 +1375,8 @@ int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
 			err = snd_pcm_hw_param_first(pcm, params, *v, NULL);
 		else
 			err = snd_pcm_hw_param_last(pcm, params, *v, NULL);
-		snd_assert(err >= 0, return err);
+		if (snd_BUG_ON(err < 0))
+			return err;
 	}
 	return 0;
 }
@@ -1466,9 +1474,9 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime;
 	unsigned long flags;
 
-	snd_assert(substream != NULL, return);
+	if (PCM_RUNTIME_CHECK(substream))
+		return;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return);
 
 	if (runtime->transfer_ack_begin)
 		runtime->transfer_ack_begin(substream);
@@ -1567,7 +1575,6 @@ static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
 			return err;
 	} else {
 		char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
-		snd_assert(runtime->dma_area, return -EFAULT);
 		if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
 			return -EFAULT;
 	}
@@ -1629,7 +1636,10 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
 		cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
 		if (frames > cont)
 			frames = cont;
-		snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+		if (snd_BUG_ON(!frames)) {
+			snd_pcm_stream_unlock_irq(substream);
+			return -EINVAL;
+		}
 		appl_ptr = runtime->control->appl_ptr;
 		appl_ofs = appl_ptr % runtime->buffer_size;
 		snd_pcm_stream_unlock_irq(substream);
@@ -1669,18 +1679,30 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
 	return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
 }
 
-snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+/* sanity-check for read/write methods */
+static int pcm_sanity_check(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime;
-	int nonblock;
-
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
-	snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
+	if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area))
+		return -EINVAL;
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
+	return 0;
+}
+
+snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+{
+	struct snd_pcm_runtime *runtime;
+	int nonblock;
+	int err;
 
+	err = pcm_sanity_check(substream);
+	if (err < 0)
+		return err;
+	runtime = substream->runtime;
 	nonblock = !!(substream->f_flags & O_NONBLOCK);
 
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
@@ -1703,7 +1725,8 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
 	int channels = runtime->channels;
 	int c;
 	if (substream->ops->copy) {
-		snd_assert(substream->ops->silence != NULL, return -EINVAL);
+		if (snd_BUG_ON(!substream->ops->silence))
+			return -EINVAL;
 		for (c = 0; c < channels; ++c, ++bufs) {
 			if (*bufs == NULL) {
 				if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0)
@@ -1717,7 +1740,6 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
 	} else {
 		/* default transfer behaviour */
 		size_t dma_csize = runtime->dma_bytes / channels;
-		snd_assert(runtime->dma_area, return -EFAULT);
 		for (c = 0; c < channels; ++c, ++bufs) {
 			char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
 			if (*bufs == NULL) {
@@ -1738,14 +1760,12 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 {
 	struct snd_pcm_runtime *runtime;
 	int nonblock;
+	int err;
 
-	snd_assert(substream != NULL, return -ENXIO);
+	err = pcm_sanity_check(substream);
+	if (err < 0)
+		return err;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
-	snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
-	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
-		return -EBADFD;
-
 	nonblock = !!(substream->f_flags & O_NONBLOCK);
 
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
@@ -1769,7 +1789,6 @@ static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream,
 			return err;
 	} else {
 		char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
-		snd_assert(runtime->dma_area, return -EFAULT);
 		if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
 			return -EFAULT;
 	}
@@ -1841,7 +1860,10 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
 		cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
 		if (frames > cont)
 			frames = cont;
-		snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+		if (snd_BUG_ON(!frames)) {
+			snd_pcm_stream_unlock_irq(substream);
+			return -EINVAL;
+		}
 		appl_ptr = runtime->control->appl_ptr;
 		appl_ofs = appl_ptr % runtime->buffer_size;
 		snd_pcm_stream_unlock_irq(substream);
@@ -1879,14 +1901,12 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
 {
 	struct snd_pcm_runtime *runtime;
 	int nonblock;
+	int err;
 	
-	snd_assert(substream != NULL, return -ENXIO);
+	err = pcm_sanity_check(substream);
+	if (err < 0)
+		return err;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
-	snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
-	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
-		return -EBADFD;
-
 	nonblock = !!(substream->f_flags & O_NONBLOCK);
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
 		return -EINVAL;
@@ -1916,7 +1936,6 @@ static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
 		}
 	} else {
 		snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
-		snd_assert(runtime->dma_area, return -EFAULT);
 		for (c = 0; c < channels; ++c, ++bufs) {
 			char *hwbuf;
 			char __user *buf;
@@ -1938,11 +1957,12 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
 {
 	struct snd_pcm_runtime *runtime;
 	int nonblock;
+	int err;
 
-	snd_assert(substream != NULL, return -ENXIO);
+	err = pcm_sanity_check(substream);
+	if (err < 0)
+		return err;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
-	snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index ff07b4a9992..a6d42808828 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -50,8 +50,6 @@ static int preallocate_pcm_pages(struct snd_pcm_substream *substream, size_t siz
 	struct snd_dma_buffer *dmab = &substream->dma_buffer;
 	int err;
 
-	snd_assert(size > 0, return -EINVAL);
-
 	/* already reserved? */
 	if (snd_dma_get_reserved_buf(dmab, substream->dma_buf_id) > 0) {
 		if (dmab->bytes >= size)
@@ -326,6 +324,32 @@ struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigne
 
 EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page);
 
+/*
+ * compute the max chunk size with continuous pages on sg-buffer
+ */
+unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
+					  unsigned int ofs, unsigned int size)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	unsigned int start, end, pg;
+
+	start = ofs >> PAGE_SHIFT;
+	end = (ofs + size - 1) >> PAGE_SHIFT;
+	/* check page continuity */
+	pg = sg->table[start].addr >> PAGE_SHIFT;
+	for (;;) {
+		start++;
+		if (start > end)
+			break;
+		pg++;
+		if ((sg->table[start].addr >> PAGE_SHIFT) != pg)
+			return (start << PAGE_SHIFT) - ofs;
+	}
+	/* ok, all on continuous pages */
+	return size;
+}
+EXPORT_SYMBOL(snd_pcm_sgbuf_get_chunk_size);
+
 /**
  * snd_pcm_lib_malloc_pages - allocate the DMA buffer
  * @substream: the substream to allocate the DMA buffer to
@@ -342,10 +366,12 @@ int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)
 	struct snd_pcm_runtime *runtime;
 	struct snd_dma_buffer *dmab = NULL;
 
-	snd_assert(substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_UNKNOWN, return -EINVAL);
-	snd_assert(substream != NULL, return -EINVAL);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -EINVAL;
+	if (snd_BUG_ON(substream->dma_buffer.dev.type ==
+		       SNDRV_DMA_TYPE_UNKNOWN))
+		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EINVAL);
 
 	if (runtime->dma_buffer_p) {
 		/* perphaps, we might free the large DMA memory region
@@ -391,9 +417,9 @@ int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime;
 
-	snd_assert(substream != NULL, return -EINVAL);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EINVAL);
 	if (runtime->dma_area == NULL)
 		return 0;
 	if (runtime->dma_buffer_p != &substream->dma_buffer) {
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index c49b9d9e303..e61e12506de 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -95,7 +95,6 @@ int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 	struct snd_pcm *pcm = substream->pcm;
 	struct snd_pcm_str *pstr = substream->pstr;
 
-	snd_assert(substream != NULL, return -ENXIO);
 	memset(info, 0, sizeof(*info));
 	info->card = pcm->card->number;
 	info->device = pcm->device;
@@ -370,9 +369,9 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 	unsigned int bits;
 	snd_pcm_uframes_t frames;
 
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
 	snd_pcm_stream_lock_irq(substream);
 	switch (runtime->status->state) {
 	case SNDRV_PCM_STATE_OPEN:
@@ -490,9 +489,9 @@ static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime;
 	int result = 0;
 
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
 	snd_pcm_stream_lock_irq(substream);
 	switch (runtime->status->state) {
 	case SNDRV_PCM_STATE_SETUP:
@@ -518,9 +517,9 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_pcm_runtime *runtime;
 
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -ENXIO);
 	snd_pcm_stream_lock_irq(substream);
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 		snd_pcm_stream_unlock_irq(substream);
@@ -622,11 +621,8 @@ static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 			       struct snd_pcm_status __user * _status)
 {
 	struct snd_pcm_status status;
-	struct snd_pcm_runtime *runtime;
 	int res;
 	
-	snd_assert(substream != NULL, return -ENXIO);
-	runtime = substream->runtime;
 	memset(&status, 0, sizeof(status));
 	res = snd_pcm_status(substream, &status);
 	if (res < 0)
@@ -642,7 +638,6 @@ static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 	struct snd_pcm_runtime *runtime;
 	unsigned int channel;
 	
-	snd_assert(substream != NULL, return -ENXIO);
 	channel = info->channel;
 	runtime = substream->runtime;
 	snd_pcm_stream_lock_irq(substream);
@@ -1250,7 +1245,6 @@ static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
 	int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
 	if (err < 0)
 		return err;
-	// snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
 	runtime->hw_ptr_base = 0;
 	runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
 		runtime->status->hw_ptr % runtime->period_size;
@@ -1421,7 +1415,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream)
 	int i, num_drecs;
 	struct drain_rec *drec, drec_tmp, *d;
 
-	snd_assert(substream != NULL, return -ENXIO);
 	card = substream->pcm->card;
 	runtime = substream->runtime;
 
@@ -1541,21 +1534,16 @@ static int snd_pcm_drop(struct snd_pcm_substream *substream)
 	struct snd_card *card;
 	int result = 0;
 	
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
 	card = substream->pcm->card;
 
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
-	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
+	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
+	    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
 		return -EBADFD;
 
-	snd_power_lock(card);
-	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
-		result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
-		if (result < 0)
-			goto _unlock;
-	}
-
 	snd_pcm_stream_lock_irq(substream);
 	/* resume pause */
 	if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
@@ -1564,8 +1552,7 @@ static int snd_pcm_drop(struct snd_pcm_substream *substream)
 	snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
 	/* runtime->control->appl_ptr = runtime->status->hw_ptr; */
 	snd_pcm_stream_unlock_irq(substream);
- _unlock:
-	snd_power_unlock(card);
+
 	return result;
 }
 
@@ -1941,33 +1928,41 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
 			mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
 	}
 	err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
 					   hw->channels_min, hw->channels_max);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
 					   hw->rate_min, hw->rate_max);
-	snd_assert(err >= 0, return -EINVAL);
+	 if (err < 0)
+		 return err;
 
 	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 					   hw->period_bytes_min, hw->period_bytes_max);
-	snd_assert(err >= 0, return -EINVAL);
+	 if (err < 0)
+		 return err;
 
 	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
 					   hw->periods_min, hw->periods_max);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 					   hw->period_bytes_min, hw->buffer_bytes_max);
-	snd_assert(err >= 0, return -EINVAL);
+	if (err < 0)
+		return err;
 
 	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
 				  snd_pcm_hw_rule_buffer_bytes_max, substream,
@@ -1978,7 +1973,8 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
 	/* FIXME: remove */
 	if (runtime->dma_bytes) {
 		err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
-		snd_assert(err >= 0, return -EINVAL);
+		if (err < 0)
+			return -EINVAL;
 	}
 
 	if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
@@ -2074,8 +2070,8 @@ static int snd_pcm_open_file(struct file *file,
 	struct snd_pcm_str *str;
 	int err;
 
-	snd_assert(rpcm_file != NULL, return -EINVAL);
-	*rpcm_file = NULL;
+	if (rpcm_file)
+		*rpcm_file = NULL;
 
 	err = snd_pcm_open_substream(pcm, stream, file, &substream);
 	if (err < 0)
@@ -2093,7 +2089,8 @@ static int snd_pcm_open_file(struct file *file,
 		substream->pcm_release = pcm_release_private;
 	}
 	file->private_data = pcm_file;
-	*rpcm_file = pcm_file;
+	if (rpcm_file)
+		*rpcm_file = pcm_file;
 	return 0;
 }
 
@@ -2177,7 +2174,8 @@ static int snd_pcm_release(struct inode *inode, struct file *file)
 
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (snd_BUG_ON(!substream))
+		return -ENXIO;
 	pcm = substream->pcm;
 	fasync_helper(-1, file, 0, &substream->runtime->fasync);
 	mutex_lock(&pcm->open_mutex);
@@ -2500,8 +2498,6 @@ static int snd_pcm_common_ioctl1(struct file *file,
 				 struct snd_pcm_substream *substream,
 				 unsigned int cmd, void __user *arg)
 {
-	snd_assert(substream != NULL, return -ENXIO);
-
 	switch (cmd) {
 	case SNDRV_PCM_IOCTL_PVERSION:
 		return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
@@ -2570,8 +2566,10 @@ static int snd_pcm_playback_ioctl1(struct file *file,
 				   struct snd_pcm_substream *substream,
 				   unsigned int cmd, void __user *arg)
 {
-	snd_assert(substream != NULL, return -ENXIO);
-	snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
+	if (snd_BUG_ON(!substream))
+		return -ENXIO;
+	if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
+		return -EINVAL;
 	switch (cmd) {
 	case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
 	{
@@ -2650,8 +2648,10 @@ static int snd_pcm_capture_ioctl1(struct file *file,
 				  struct snd_pcm_substream *substream,
 				  unsigned int cmd, void __user *arg)
 {
-	snd_assert(substream != NULL, return -ENXIO);
-	snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
+	if (snd_BUG_ON(!substream))
+		return -ENXIO;
+	if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
+		return -EINVAL;
 	switch (cmd) {
 	case SNDRV_PCM_IOCTL_READI_FRAMES:
 	{
@@ -2790,7 +2790,8 @@ static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
 
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
@@ -2813,21 +2814,17 @@ static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
 
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, result = -ENXIO; goto end);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-		result = -EBADFD;
-		goto end;
-	}
-	if (!frame_aligned(runtime, count)) {
-		result = -EINVAL;
-		goto end;
-	}
+	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+		return -EBADFD;
+	if (!frame_aligned(runtime, count))
+		return -EINVAL;
 	count = bytes_to_frames(runtime, count);
 	result = snd_pcm_lib_write(substream, buf, count);
 	if (result > 0)
 		result = frames_to_bytes(runtime, result);
- end:
 	return result;
 }
 
@@ -2845,7 +2842,8 @@ static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
 
 	pcm_file = iocb->ki_filp->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
@@ -2879,17 +2877,14 @@ static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
 
 	pcm_file = iocb->ki_filp->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, result = -ENXIO; goto end);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
-	if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-		result = -EBADFD;
-		goto end;
-	}
+	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+		return -EBADFD;
 	if (nr_segs > 128 || nr_segs != runtime->channels ||
-	    !frame_aligned(runtime, iov->iov_len)) {
-		result = -EINVAL;
-		goto end;
-	}
+	    !frame_aligned(runtime, iov->iov_len))
+		return -EINVAL;
 	frames = bytes_to_samples(runtime, iov->iov_len);
 	bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
 	if (bufs == NULL)
@@ -2900,7 +2895,6 @@ static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	if (result > 0)
 		result = frames_to_bytes(runtime, result);
 	kfree(bufs);
- end:
 	return result;
 }
 
@@ -2915,7 +2909,8 @@ static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
 	pcm_file = file->private_data;
 
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
 
 	poll_wait(file, &runtime->sleep, wait);
@@ -2953,7 +2948,8 @@ static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
 	pcm_file = file->private_data;
 
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 	runtime = substream->runtime;
 
 	poll_wait(file, &runtime->sleep, wait);
@@ -3023,7 +3019,6 @@ static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file
 	if (!(area->vm_flags & VM_READ))
 		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EAGAIN);
 	size = area->vm_end - area->vm_start;
 	if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
 		return -EINVAL;
@@ -3063,7 +3058,6 @@ static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file
 	if (!(area->vm_flags & VM_READ))
 		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EAGAIN);
 	size = area->vm_end - area->vm_start;
 	if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
 		return -EINVAL;
@@ -3195,7 +3189,6 @@ int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
 			return -EINVAL;
 	}
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EAGAIN);
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 	if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
@@ -3227,7 +3220,8 @@ static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
 	
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -ENXIO;
 
 	offset = area->vm_pgoff << PAGE_SHIFT;
 	switch (offset) {
@@ -3255,9 +3249,9 @@ static int snd_pcm_fasync(int fd, struct file * file, int on)
 	lock_kernel();
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, goto out);
+	if (PCM_RUNTIME_CHECK(substream))
+		goto out;
 	runtime = substream->runtime;
-
 	err = fasync_helper(fd, file, on, &runtime->fasync);
 out:
 	unlock_kernel();
@@ -3391,6 +3385,17 @@ out:
 }
 #endif /* CONFIG_SND_SUPPORT_OLD_API */
 
+#ifndef CONFIG_MMU
+unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
+				      unsigned long len, unsigned long pgoff,
+				      unsigned long flags)
+{
+	return 0;
+}
+#else
+# define dummy_get_unmapped_area NULL
+#endif
+
 /*
  *  Register section
  */
@@ -3407,6 +3412,7 @@ const struct file_operations snd_pcm_f_ops[2] = {
 		.compat_ioctl = 	snd_pcm_ioctl_compat,
 		.mmap =			snd_pcm_mmap,
 		.fasync =		snd_pcm_fasync,
+		.get_unmapped_area =	dummy_get_unmapped_area,
 	},
 	{
 		.owner =		THIS_MODULE,
@@ -3419,5 +3425,6 @@ const struct file_operations snd_pcm_f_ops[2] = {
 		.compat_ioctl = 	snd_pcm_ioctl_compat,
 		.mmap =			snd_pcm_mmap,
 		.fasync =		snd_pcm_fasync,
+		.get_unmapped_area =	dummy_get_unmapped_area,
 	}
 };
diff --git a/sound/core/pcm_timer.c b/sound/core/pcm_timer.c
index 033a024d153..2c89c04f291 100644
--- a/sound/core/pcm_timer.c
+++ b/sound/core/pcm_timer.c
@@ -51,12 +51,14 @@ void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream)
 	
         mult = 1000000000;
 	rate = runtime->rate;
-	snd_assert(rate != 0, return);
+	if (snd_BUG_ON(!rate))
+		return;
 	l = gcd(mult, rate);
 	mult /= l;
 	rate /= l;
 	fsize = runtime->period_size;
-	snd_assert(fsize != 0, return);
+	if (snd_BUG_ON(!fsize))
+		return;
 	l = gcd(rate, fsize);
 	rate /= l;
 	fsize /= l;
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index f7ea7287c59..c4995c9f573 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -418,7 +418,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
 	mutex_lock(&rmidi->open_mutex);
 	while (1) {
 		subdevice = -1;
-		down_read(&card->controls_rwsem);
+		read_lock(&card->ctl_files_rwlock);
 		list_for_each_entry(kctl, &card->ctl_files, list) {
 			if (kctl->pid == current->pid) {
 				subdevice = kctl->prefer_rawmidi_subdevice;
@@ -426,7 +426,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
 					break;
 			}
 		}
-		up_read(&card->controls_rwsem);
+		read_unlock(&card->ctl_files_rwlock);
 		err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,
 					      subdevice, fflags, rawmidi_file);
 		if (err >= 0)
@@ -470,8 +470,8 @@ int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
 	struct snd_rawmidi_substream *substream;
 	struct snd_rawmidi_runtime *runtime;
 
-	snd_assert(rfile != NULL, return -ENXIO);
-	snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
+	if (snd_BUG_ON(!rfile))
+		return -ENXIO;
 	rmidi = rfile->rmidi;
 	mutex_lock(&rmidi->open_mutex);
 	if (rfile->input != NULL) {
@@ -1100,7 +1100,7 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 		return -EINVAL;
 	}
 	spin_lock_irqsave(&runtime->lock, flags);
-	snd_assert(runtime->avail + count <= runtime->buffer_size, );
+	snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
 	runtime->hw_ptr += count;
 	runtime->hw_ptr %= runtime->buffer_size;
 	runtime->avail += count;
@@ -1141,8 +1141,10 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
 	long count1, result;
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
-	snd_assert(kernelbuf != NULL || userbuf != NULL, return -EINVAL);
-	snd_assert(runtime->buffer != NULL, return -EINVAL);
+	if (snd_BUG_ON(!kernelbuf && !userbuf))
+		return -EINVAL;
+	if (snd_BUG_ON(!runtime->buffer))
+		return -EINVAL;
 
 	result = 0;
 	spin_lock_irqsave(&runtime->lock, flags);
@@ -1420,9 +1422,10 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 		.dev_disconnect = snd_rawmidi_dev_disconnect,
 	};
 
-	snd_assert(rrawmidi != NULL, return -EINVAL);
-	*rrawmidi = NULL;
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
+	if (rrawmidi)
+		*rrawmidi = NULL;
 	rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
 	if (rmidi == NULL) {
 		snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
@@ -1455,7 +1458,8 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 		snd_rawmidi_free(rmidi);
 		return err;
 	}
-	*rrawmidi = rmidi;
+	if (rrawmidi)
+		*rrawmidi = rmidi;
 	return 0;
 }
 
@@ -1472,7 +1476,8 @@ static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
 
 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
 {
-	snd_assert(rmidi != NULL, return -ENXIO);	
+	if (!rmidi)
+		return 0;
 
 	snd_info_free_entry(rmidi->proc_entry);
 	rmidi->proc_entry = NULL;
diff --git a/sound/core/rtctimer.c b/sound/core/rtctimer.c
index 97b30fb4c36..51e64e30dd3 100644
--- a/sound/core/rtctimer.c
+++ b/sound/core/rtctimer.c
@@ -91,7 +91,8 @@ static int
 rtctimer_start(struct snd_timer *timer)
 {
 	rtc_task_t *rtc = timer->private_data;
-	snd_assert(rtc != NULL, return -EINVAL);
+	if (snd_BUG_ON(!rtc))
+		return -EINVAL;
 	rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
 	rtc_control(rtc, RTC_PIE_ON, 0);
 	return 0;
@@ -101,7 +102,8 @@ static int
 rtctimer_stop(struct snd_timer *timer)
 {
 	rtc_task_t *rtc = timer->private_data;
-	snd_assert(rtc != NULL, return -EINVAL);
+	if (snd_BUG_ON(!rtc))
+		return -EINVAL;
 	rtc_control(rtc, RTC_PIE_OFF, 0);
 	return 0;
 }
diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c
index 777796e9449..f25e3cc7ddf 100644
--- a/sound/core/seq/oss/seq_oss.c
+++ b/sound/core/seq/oss/seq_oss.c
@@ -164,7 +164,8 @@ odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
 {
 	struct seq_oss_devinfo *dp;
 	dp = file->private_data;
-	snd_assert(dp != NULL, return -EIO);
+	if (snd_BUG_ON(!dp))
+		return -ENXIO;
 	return snd_seq_oss_read(dp, buf, count);
 }
 
@@ -174,7 +175,8 @@ odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offs
 {
 	struct seq_oss_devinfo *dp;
 	dp = file->private_data;
-	snd_assert(dp != NULL, return -EIO);
+	if (snd_BUG_ON(!dp))
+		return -ENXIO;
 	return snd_seq_oss_write(dp, buf, count, file);
 }
 
@@ -183,7 +185,8 @@ odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct seq_oss_devinfo *dp;
 	dp = file->private_data;
-	snd_assert(dp != NULL, return -EIO);
+	if (snd_BUG_ON(!dp))
+		return -ENXIO;
 	return snd_seq_oss_ioctl(dp, cmd, arg);
 }
 
@@ -198,7 +201,8 @@ odev_poll(struct file *file, poll_table * wait)
 {
 	struct seq_oss_devinfo *dp;
 	dp = file->private_data;
-	snd_assert(dp != NULL, return 0);
+	if (snd_BUG_ON(!dp))
+		return -ENXIO;
 	return snd_seq_oss_poll(dp, file, wait);
 }
 
diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c
index e024e4588b8..945a27c34a9 100644
--- a/sound/core/seq/oss/seq_oss_synth.c
+++ b/sound/core/seq/oss/seq_oss_synth.c
@@ -308,7 +308,8 @@ snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp)
 	struct seq_oss_synth *rec;
 	struct seq_oss_synthinfo *info;
 
-	snd_assert(dp->max_synthdev <= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS, return);
+	if (snd_BUG_ON(dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS))
+		return;
 	for (i = 0; i < dp->max_synthdev; i++) {
 		info = &dp->synths[i];
 		if (! info->opened)
@@ -402,7 +403,8 @@ snd_seq_oss_synth_reset(struct seq_oss_devinfo *dp, int dev)
 	struct seq_oss_synth *rec;
 	struct seq_oss_synthinfo *info;
 
-	snd_assert(dev >= 0 && dev < dp->max_synthdev, return);
+	if (snd_BUG_ON(dev < 0 || dev >= dp->max_synthdev))
+		return;
 	info = &dp->synths[dev];
 	if (! info->opened)
 		return;
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 7a1545d2d95..8ca2be339f3 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -266,7 +266,8 @@ static int seq_free_client1(struct snd_seq_client *client)
 {
 	unsigned long flags;
 
-	snd_assert(client != NULL, return -EINVAL);
+	if (!client)
+		return 0;
 	snd_seq_delete_all_ports(client);
 	snd_seq_queue_client_leave(client->number);
 	spin_lock_irqsave(&clients_lock, flags);
@@ -403,7 +404,8 @@ static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
 		return -EFAULT;
 
 	/* check client structures are in place */
-	snd_assert(client != NULL, return -ENXIO);
+	if (snd_BUG_ON(!client))
+		return -ENXIO;
 
 	if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
 		return -ENXIO;
@@ -825,7 +827,8 @@ int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
 	struct snd_seq_client *client;
 	int result;
 
-	snd_assert(cell != NULL, return -EINVAL);
+	if (snd_BUG_ON(!cell))
+		return -EINVAL;
 
 	client = snd_seq_client_use_ptr(cell->event.source.client);
 	if (client == NULL) {
@@ -994,7 +997,8 @@ static ssize_t snd_seq_write(struct file *file, const char __user *buf,
 		return -ENXIO;
 
 	/* check client structures are in place */
-	snd_assert(client != NULL, return -ENXIO);
+	if (snd_BUG_ON(!client))
+		return -ENXIO;
 		
 	if (!client->accept_output || client->pool == NULL)
 		return -ENXIO;
@@ -1076,7 +1080,8 @@ static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
 	unsigned int mask = 0;
 
 	/* check client structures are in place */
-	snd_assert(client != NULL, return -ENXIO);
+	if (snd_BUG_ON(!client))
+		return -ENXIO;
 
 	if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
 	    client->data.user.fifo) {
@@ -2195,7 +2200,8 @@ static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 {
 	struct snd_seq_client *client = file->private_data;
 
-	snd_assert(client != NULL, return -ENXIO);
+	if (snd_BUG_ON(!client))
+		return -ENXIO;
 		
 	return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
 }
@@ -2216,7 +2222,8 @@ int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
 	struct snd_seq_client *client;
 	va_list args;
 
-	snd_assert(! in_interrupt(), return -EBUSY);
+	if (snd_BUG_ON(in_interrupt()))
+		return -EBUSY;
 
 	if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
 		return -EINVAL;
@@ -2265,7 +2272,8 @@ int snd_seq_delete_kernel_client(int client)
 {
 	struct snd_seq_client *ptr;
 
-	snd_assert(! in_interrupt(), return -EBUSY);
+	if (snd_BUG_ON(in_interrupt()))
+		return -EBUSY;
 
 	ptr = clientptr(client);
 	if (ptr == NULL)
@@ -2288,7 +2296,8 @@ static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
 	struct snd_seq_client *cptr;
 	int result;
 
-	snd_assert(ev != NULL, return -EINVAL);
+	if (snd_BUG_ON(!ev))
+		return -EINVAL;
 
 	if (ev->type == SNDRV_SEQ_EVENT_NONE)
 		return 0; /* ignore this */
@@ -2354,7 +2363,8 @@ int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
 	struct snd_seq_client *cptr;
 	int result;
 
-	snd_assert(ev != NULL, return -EINVAL);
+	if (snd_BUG_ON(!ev))
+		return -EINVAL;
 
 	/* fill in client number */
 	ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c
index 9628c06e4ea..38693f47c26 100644
--- a/sound/core/seq/seq_compat.c
+++ b/sound/core/seq/seq_compat.c
@@ -92,7 +92,8 @@ static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
 	struct snd_seq_client *client = file->private_data;
 	void __user *argp = compat_ptr(arg);
 
-	snd_assert(client != NULL, return -ENXIO);
+	if (snd_BUG_ON(!client))
+		return -ENXIO;
 
 	switch (cmd) {
 	case SNDRV_SEQ_IOCTL_PVERSION:
diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c
index 05410e536a4..1f997675c89 100644
--- a/sound/core/seq/seq_device.c
+++ b/sound/core/seq/seq_device.c
@@ -187,7 +187,8 @@ int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize,
 	if (result)
 		*result = NULL;
 
-	snd_assert(id != NULL, return -EINVAL);
+	if (snd_BUG_ON(!id))
+		return -EINVAL;
 
 	ops = find_driver(id, 1);
 	if (ops == NULL)
@@ -232,7 +233,8 @@ static int snd_seq_device_free(struct snd_seq_device *dev)
 {
 	struct ops_list *ops;
 
-	snd_assert(dev != NULL, return -EINVAL);
+	if (snd_BUG_ON(!dev))
+		return -EINVAL;
 
 	ops = find_driver(dev->id, 0);
 	if (ops == NULL)
diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c
index 3a94ed021bd..0d75afa786b 100644
--- a/sound/core/seq/seq_fifo.c
+++ b/sound/core/seq/seq_fifo.c
@@ -65,9 +65,11 @@ void snd_seq_fifo_delete(struct snd_seq_fifo **fifo)
 {
 	struct snd_seq_fifo *f;
 
-	snd_assert(fifo != NULL, return);
+	if (snd_BUG_ON(!fifo))
+		return;
 	f = *fifo;
-	snd_assert(f != NULL, return);
+	if (snd_BUG_ON(!f))
+		return;
 	*fifo = NULL;
 
 	snd_seq_fifo_clear(f);
@@ -116,7 +118,8 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f,
 	unsigned long flags;
 	int err;
 
-	snd_assert(f != NULL, return -EINVAL);
+	if (snd_BUG_ON(!f))
+		return -EINVAL;
 
 	snd_use_lock_use(&f->use_lock);
 	err = snd_seq_event_dup(f->pool, event, &cell, 1, NULL); /* always non-blocking */
@@ -174,7 +177,8 @@ int snd_seq_fifo_cell_out(struct snd_seq_fifo *f,
 	unsigned long flags;
 	wait_queue_t wait;
 
-	snd_assert(f != NULL, return -EINVAL);
+	if (snd_BUG_ON(!f))
+		return -EINVAL;
 
 	*cellp = NULL;
 	init_waitqueue_entry(&wait, current);
@@ -233,7 +237,8 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize)
 	struct snd_seq_pool *newpool, *oldpool;
 	struct snd_seq_event_cell *cell, *next, *oldhead;
 
-	snd_assert(f != NULL && f->pool != NULL, return -EINVAL);
+	if (snd_BUG_ON(!f || !f->pool))
+		return -EINVAL;
 
 	/* allocate new pool */
 	newpool = snd_seq_pool_new(poolsize);
diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c
index 0cf6ac47731..7fb55436287 100644
--- a/sound/core/seq/seq_memory.c
+++ b/sound/core/seq/seq_memory.c
@@ -187,9 +187,11 @@ void snd_seq_cell_free(struct snd_seq_event_cell * cell)
 	unsigned long flags;
 	struct snd_seq_pool *pool;
 
-	snd_assert(cell != NULL, return);
+	if (snd_BUG_ON(!cell))
+		return;
 	pool = cell->pool;
-	snd_assert(pool != NULL, return);
+	if (snd_BUG_ON(!pool))
+		return;
 
 	spin_lock_irqsave(&pool->lock, flags);
 	free_cell(pool, cell);
@@ -378,7 +380,8 @@ int snd_seq_pool_init(struct snd_seq_pool *pool)
 	struct snd_seq_event_cell *cellptr;
 	unsigned long flags;
 
-	snd_assert(pool != NULL, return -EINVAL);
+	if (snd_BUG_ON(!pool))
+		return -EINVAL;
 	if (pool->ptr)			/* should be atomic? */
 		return 0;
 
@@ -414,7 +417,8 @@ int snd_seq_pool_done(struct snd_seq_pool *pool)
 	struct snd_seq_event_cell *ptr;
 	int max_count = 5 * HZ;
 
-	snd_assert(pool != NULL, return -EINVAL);
+	if (snd_BUG_ON(!pool))
+		return -EINVAL;
 
 	/* wait for closing all threads */
 	spin_lock_irqsave(&pool->lock, flags);
diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
index 99b35360c50..4d26146a62c 100644
--- a/sound/core/seq/seq_midi.c
+++ b/sound/core/seq/seq_midi.c
@@ -116,7 +116,8 @@ static int dump_midi(struct snd_rawmidi_substream *substream, const char *buf, i
 	struct snd_rawmidi_runtime *runtime;
 	int tmp;
 
-	snd_assert(substream != NULL || buf != NULL, return -EINVAL);
+	if (snd_BUG_ON(!substream || !buf))
+		return -EINVAL;
 	runtime = substream->runtime;
 	if ((tmp = runtime->avail) < count) {
 		snd_printd("warning, output event was lost (count = %i, available = %i)\n", count, tmp);
@@ -135,7 +136,8 @@ static int event_process_midi(struct snd_seq_event *ev, int direct,
 	struct snd_rawmidi_substream *substream;
 	int len;
 
-	snd_assert(msynth != NULL, return -EINVAL);
+	if (snd_BUG_ON(!msynth))
+		return -EINVAL;
 	substream = msynth->output_rfile.output;
 	if (substream == NULL)
 		return -ENODEV;
@@ -210,7 +212,8 @@ static int midisynth_unsubscribe(void *private_data, struct snd_seq_port_subscri
 	int err;
 	struct seq_midisynth *msynth = private_data;
 
-	snd_assert(msynth->input_rfile.input != NULL, return -EINVAL);
+	if (snd_BUG_ON(!msynth->input_rfile.input))
+		return -EINVAL;
 	err = snd_rawmidi_kernel_release(&msynth->input_rfile);
 	return err;
 }
@@ -247,7 +250,8 @@ static int midisynth_unuse(void *private_data, struct snd_seq_port_subscribe *in
 	struct seq_midisynth *msynth = private_data;
 	unsigned char buf = 0xff; /* MIDI reset */
 
-	snd_assert(msynth->output_rfile.output != NULL, return -EINVAL);
+	if (snd_BUG_ON(!msynth->output_rfile.output))
+		return -EINVAL;
 	/* sending single MIDI reset message to shut the device up */
 	snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1);
 	snd_rawmidi_drain_output(msynth->output_rfile.output);
@@ -285,7 +289,8 @@ snd_seq_midisynth_register_port(struct snd_seq_device *dev)
 	int device = dev->device;
 	unsigned int input_count = 0, output_count = 0;
 
-	snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL);
+	if (snd_BUG_ON(!card || device < 0 || device >= SNDRV_RAWMIDI_DEVICES))
+		return -EINVAL;
 	info = kmalloc(sizeof(*info), GFP_KERNEL);
 	if (! info)
 		return -ENOMEM;
diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c
index 1c32a53d6bd..3bf7d73ac52 100644
--- a/sound/core/seq/seq_ports.c
+++ b/sound/core/seq/seq_ports.c
@@ -130,7 +130,8 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client,
 	int num = -1;
 	
 	/* sanity check */
-	snd_assert(client, return NULL);
+	if (snd_BUG_ON(!client))
+		return NULL;
 
 	if (client->num_ports >= SNDRV_SEQ_MAX_PORTS - 1) {
 		snd_printk(KERN_WARNING "too many ports for client %d\n", client->number);
@@ -268,8 +269,8 @@ static int port_delete(struct snd_seq_client *client,
 	if (port->private_free)
 		port->private_free(port->private_data);
 
-	snd_assert(port->c_src.count == 0,);
-	snd_assert(port->c_dest.count == 0,);
+	snd_BUG_ON(port->c_src.count != 0);
+	snd_BUG_ON(port->c_dest.count != 0);
 
 	kfree(port);
 	return 0;
@@ -336,7 +337,8 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client)
 int snd_seq_set_port_info(struct snd_seq_client_port * port,
 			  struct snd_seq_port_info * info)
 {
-	snd_assert(port && info, return -EINVAL);
+	if (snd_BUG_ON(!port || !info))
+		return -EINVAL;
 
 	/* set port name */
 	if (info->name[0])
@@ -365,7 +367,8 @@ int snd_seq_set_port_info(struct snd_seq_client_port * port,
 int snd_seq_get_port_info(struct snd_seq_client_port * port,
 			  struct snd_seq_port_info * info)
 {
-	snd_assert(port && info, return -EINVAL);
+	if (snd_BUG_ON(!port || !info))
+		return -EINVAL;
 
 	/* get port name */
 	strlcpy(info->name, port->name, sizeof(info->name));
diff --git a/sound/core/seq/seq_prioq.c b/sound/core/seq/seq_prioq.c
index 85969db576c..0101a8b99b7 100644
--- a/sound/core/seq/seq_prioq.c
+++ b/sound/core/seq/seq_prioq.c
@@ -153,8 +153,8 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
 	int count;
 	int prior;
 
-	snd_assert(f, return -EINVAL);
-	snd_assert(cell, return -EINVAL);
+	if (snd_BUG_ON(!f || !cell))
+		return -EINVAL;
 	
 	/* check flags */
 	prior = (cell->event.flags & SNDRV_SEQ_PRIORITY_MASK);
diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c
index 4a48c6ee8ee..e7a8e9e4edb 100644
--- a/sound/core/seq/seq_queue.c
+++ b/sound/core/seq/seq_queue.c
@@ -315,7 +315,8 @@ int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop)
 	int dest, err;
 	struct snd_seq_queue *q;
 
-	snd_assert(cell != NULL, return -EINVAL);
+	if (snd_BUG_ON(!cell))
+		return -EINVAL;
 	dest = cell->event.queue;	/* destination queue */
 	q = queueptr(dest);
 	if (q == NULL)
@@ -734,7 +735,8 @@ int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop)
 {
 	struct snd_seq_queue *q;
 
-	snd_assert(ev != NULL, return -EINVAL);
+	if (snd_BUG_ON(!ev))
+		return -EINVAL;
 	q = queueptr(ev->data.queue.queue);
 
 	if (q == NULL)
diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c
index d8fcd62e400..f745c317d6a 100644
--- a/sound/core/seq/seq_timer.c
+++ b/sound/core/seq/seq_timer.c
@@ -173,7 +173,8 @@ int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo)
 {
 	unsigned long flags;
 
-	snd_assert(tmr, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 	if (tempo <= 0)
 		return -EINVAL;
 	spin_lock_irqsave(&tmr->lock, flags);
@@ -190,7 +191,8 @@ int snd_seq_timer_set_ppq(struct snd_seq_timer * tmr, int ppq)
 {
 	unsigned long flags;
 
-	snd_assert(tmr, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 	if (ppq <= 0)
 		return -EINVAL;
 	spin_lock_irqsave(&tmr->lock, flags);
@@ -214,7 +216,8 @@ int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr,
 {
 	unsigned long flags;
 
-	snd_assert(tmr, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 
 	spin_lock_irqsave(&tmr->lock, flags);
 	tmr->tick.cur_tick = position;
@@ -229,7 +232,8 @@ int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr,
 {
 	unsigned long flags;
 
-	snd_assert(tmr, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 
 	snd_seq_sanity_real_time(&position);
 	spin_lock_irqsave(&tmr->lock, flags);
@@ -244,7 +248,8 @@ int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew,
 {
 	unsigned long flags;
 
-	snd_assert(tmr, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 
 	/* FIXME */
 	if (base != SKEW_BASE) {
@@ -265,7 +270,8 @@ int snd_seq_timer_open(struct snd_seq_queue *q)
 	int err;
 
 	tmr = q->timer;
-	snd_assert(tmr != NULL, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 	if (tmr->timeri)
 		return -EBUSY;
 	sprintf(str, "sequencer queue %i", q->queue);
@@ -302,7 +308,8 @@ int snd_seq_timer_close(struct snd_seq_queue *q)
 	struct snd_seq_timer *tmr;
 	
 	tmr = q->timer;
-	snd_assert(tmr != NULL, return -EINVAL);
+	if (snd_BUG_ON(!tmr))
+		return -EINVAL;
 	if (tmr->timeri) {
 		snd_timer_stop(tmr->timeri);
 		snd_timer_close(tmr->timeri);
@@ -328,7 +335,8 @@ static int initialize_timer(struct snd_seq_timer *tmr)
 	unsigned long freq;
 
 	t = tmr->timeri->timer;
-	snd_assert(t, return -EINVAL);
+	if (snd_BUG_ON(!t))
+		return -EINVAL;
 
 	freq = tmr->preferred_resolution;
 	if (!freq)
diff --git a/sound/core/sgbuf.c b/sound/core/sgbuf.c
index cefd228cd2a..d4564edd61d 100644
--- a/sound/core/sgbuf.c
+++ b/sound/core/sgbuf.c
@@ -41,9 +41,11 @@ int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab)
 	tmpb.dev.type = SNDRV_DMA_TYPE_DEV;
 	tmpb.dev.dev = sgbuf->dev;
 	for (i = 0; i < sgbuf->pages; i++) {
+		if (!(sgbuf->table[i].addr & ~PAGE_MASK))
+			continue; /* continuous pages */
 		tmpb.area = sgbuf->table[i].buf;
-		tmpb.addr = sgbuf->table[i].addr;
-		tmpb.bytes = PAGE_SIZE;
+		tmpb.addr = sgbuf->table[i].addr & PAGE_MASK;
+		tmpb.bytes = (sgbuf->table[i].addr & ~PAGE_MASK) << PAGE_SHIFT;
 		snd_dma_free_pages(&tmpb);
 	}
 	if (dmab->area)
@@ -58,13 +60,17 @@ int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab)
 	return 0;
 }
 
+#define MAX_ALLOC_PAGES		32
+
 void *snd_malloc_sgbuf_pages(struct device *device,
 			     size_t size, struct snd_dma_buffer *dmab,
 			     size_t *res_size)
 {
 	struct snd_sg_buf *sgbuf;
-	unsigned int i, pages;
+	unsigned int i, pages, chunk, maxpages;
 	struct snd_dma_buffer tmpb;
+	struct snd_sg_page *table;
+	struct page **pgtable;
 
 	dmab->area = NULL;
 	dmab->addr = 0;
@@ -74,31 +80,55 @@ void *snd_malloc_sgbuf_pages(struct device *device,
 	sgbuf->dev = device;
 	pages = snd_sgbuf_aligned_pages(size);
 	sgbuf->tblsize = sgbuf_align_table(pages);
-	sgbuf->table = kcalloc(sgbuf->tblsize, sizeof(*sgbuf->table), GFP_KERNEL);
-	if (! sgbuf->table)
+	table = kcalloc(sgbuf->tblsize, sizeof(*table), GFP_KERNEL);
+	if (!table)
 		goto _failed;
-	sgbuf->page_table = kcalloc(sgbuf->tblsize, sizeof(*sgbuf->page_table), GFP_KERNEL);
-	if (! sgbuf->page_table)
+	sgbuf->table = table;
+	pgtable = kcalloc(sgbuf->tblsize, sizeof(*pgtable), GFP_KERNEL);
+	if (!pgtable)
 		goto _failed;
+	sgbuf->page_table = pgtable;
 
-	/* allocate each page */
-	for (i = 0; i < pages; i++) {
-		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, device, PAGE_SIZE, &tmpb) < 0) {
-			if (res_size == NULL)
+	/* allocate pages */
+	maxpages = MAX_ALLOC_PAGES;
+	while (pages > 0) {
+		chunk = pages;
+		/* don't be too eager to take a huge chunk */
+		if (chunk > maxpages)
+			chunk = maxpages;
+		chunk <<= PAGE_SHIFT;
+		if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, device,
+						 chunk, &tmpb) < 0) {
+			if (!sgbuf->pages)
+				return NULL;
+			if (!res_size)
 				goto _failed;
-			*res_size = size = sgbuf->pages * PAGE_SIZE;
+			size = sgbuf->pages * PAGE_SIZE;
 			break;
 		}
-		sgbuf->table[i].buf = tmpb.area;
-		sgbuf->table[i].addr = tmpb.addr;
-		sgbuf->page_table[i] = virt_to_page(tmpb.area);
-		sgbuf->pages++;
+		chunk = tmpb.bytes >> PAGE_SHIFT;
+		for (i = 0; i < chunk; i++) {
+			table->buf = tmpb.area;
+			table->addr = tmpb.addr;
+			if (!i)
+				table->addr |= chunk; /* mark head */
+			table++;
+			*pgtable++ = virt_to_page(tmpb.area);
+			tmpb.area += PAGE_SIZE;
+			tmpb.addr += PAGE_SIZE;
+		}
+		sgbuf->pages += chunk;
+		pages -= chunk;
+		if (chunk < maxpages)
+			maxpages = chunk;
 	}
 
 	sgbuf->size = size;
 	dmab->area = vmap(sgbuf->page_table, sgbuf->pages, VM_MAP, PAGE_KERNEL);
 	if (! dmab->area)
 		goto _failed;
+	if (res_size)
+		*res_size = sgbuf->size;
 	return dmab->area;
 
  _failed:
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 1003ae375d4..c0685e2f0af 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -34,8 +34,6 @@
 #include <linux/kmod.h>
 #include <linux/mutex.h>
 
-#define SNDRV_OS_MINORS 256
-
 static int major = CONFIG_SND_MAJOR;
 int snd_major;
 EXPORT_SYMBOL(snd_major);
@@ -208,20 +206,23 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
 		minor = type;
 		break;
 	case SNDRV_DEVICE_TYPE_CONTROL:
-		snd_assert(card != NULL, return -EINVAL);
+		if (snd_BUG_ON(!card))
+			return -EINVAL;
 		minor = SNDRV_MINOR(card->number, type);
 		break;
 	case SNDRV_DEVICE_TYPE_HWDEP:
 	case SNDRV_DEVICE_TYPE_RAWMIDI:
 	case SNDRV_DEVICE_TYPE_PCM_PLAYBACK:
 	case SNDRV_DEVICE_TYPE_PCM_CAPTURE:
-		snd_assert(card != NULL, return -EINVAL);
+		if (snd_BUG_ON(!card))
+			return -EINVAL;
 		minor = SNDRV_MINOR(card->number, type + dev);
 		break;
 	default:
 		return -EINVAL;
 	}
-	snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
+	if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OS_MINORS))
+		return -EINVAL;
 	return minor;
 }
 #endif
@@ -249,7 +250,8 @@ int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
 	int minor;
 	struct snd_minor *preg;
 
-	snd_assert(name, return -EINVAL);
+	if (snd_BUG_ON(!name))
+		return -EINVAL;
 	preg = kmalloc(sizeof *preg, GFP_KERNEL);
 	if (preg == NULL)
 		return -ENOMEM;
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index 7be51546eb9..7fe12264ff8 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -64,7 +64,8 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
 
 	switch (type) {
 	case SNDRV_OSS_DEVICE_TYPE_MIXER:
-		snd_assert(card != NULL && dev <= 1, return -EINVAL);
+		if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+			return -EINVAL;
 		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
 		break;
 	case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
@@ -74,11 +75,13 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
 		minor = SNDRV_MINOR_OSS_MUSIC;
 		break;
 	case SNDRV_OSS_DEVICE_TYPE_PCM:
-		snd_assert(card != NULL && dev <= 1, return -EINVAL);
+		if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+			return -EINVAL;
 		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
 		break;
 	case SNDRV_OSS_DEVICE_TYPE_MIDI:
-		snd_assert(card != NULL && dev <= 1, return -EINVAL);
+		if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+			return -EINVAL;
 		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
 		break;
 	case SNDRV_OSS_DEVICE_TYPE_DMFM:
@@ -90,7 +93,8 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
 	default:
 		return -EINVAL;
 	}
-	snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
+	if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OSS_MINORS))
+		return -EINVAL;
 	return minor;
 }
 
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 0af337efc64..e582face89d 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -306,7 +306,8 @@ int snd_timer_close(struct snd_timer_instance *timeri)
 	struct snd_timer *timer = NULL;
 	struct snd_timer_instance *slave, *tmp;
 
-	snd_assert(timeri != NULL, return -ENXIO);
+	if (snd_BUG_ON(!timeri))
+		return -ENXIO;
 
 	/* force to stop the timer */
 	snd_timer_stop(timeri);
@@ -385,8 +386,9 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
 		do_posix_clock_monotonic_gettime(&tstamp);
 	else
 		getnstimeofday(&tstamp);
-	snd_assert(event >= SNDRV_TIMER_EVENT_START &&
-		   event <= SNDRV_TIMER_EVENT_PAUSE, return);
+	if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START ||
+		       event > SNDRV_TIMER_EVENT_PAUSE))
+		return;
 	if (event == SNDRV_TIMER_EVENT_START ||
 	    event == SNDRV_TIMER_EVENT_CONTINUE)
 		resolution = snd_timer_resolution(ti);
@@ -474,7 +476,8 @@ static int _snd_timer_stop(struct snd_timer_instance * timeri,
 	struct snd_timer *timer;
 	unsigned long flags;
 
-	snd_assert(timeri != NULL, return -ENXIO);
+	if (snd_BUG_ON(!timeri))
+		return -ENXIO;
 
 	if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
 		if (!keep_flag) {
@@ -758,9 +761,10 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
 		.dev_disconnect = snd_timer_dev_disconnect,
 	};
 
-	snd_assert(tid != NULL, return -EINVAL);
-	snd_assert(rtimer != NULL, return -EINVAL);
-	*rtimer = NULL;
+	if (snd_BUG_ON(!tid))
+		return -EINVAL;
+	if (rtimer)
+		*rtimer = NULL;
 	timer = kzalloc(sizeof(*timer), GFP_KERNEL);
 	if (timer == NULL) {
 		snd_printk(KERN_ERR "timer: cannot allocate\n");
@@ -788,13 +792,15 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
 			return err;
 		}
 	}
-	*rtimer = timer;
+	if (rtimer)
+		*rtimer = timer;
 	return 0;
 }
 
 static int snd_timer_free(struct snd_timer *timer)
 {
-	snd_assert(timer != NULL, return -ENXIO);
+	if (!timer)
+		return 0;
 
 	mutex_lock(&register_mutex);
 	if (! list_empty(&timer->open_list_head)) {
@@ -827,8 +833,8 @@ static int snd_timer_dev_register(struct snd_device *dev)
 	struct snd_timer *timer = dev->device_data;
 	struct snd_timer *timer1;
 
-	snd_assert(timer != NULL && timer->hw.start != NULL &&
-		   timer->hw.stop != NULL, return -ENXIO);
+	if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop))
+		return -ENXIO;
 	if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&
 	    !timer->hw.resolution && timer->hw.c_resolution == NULL)
 	    	return -EINVAL;
@@ -879,8 +885,9 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstam
 
 	if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
 		return;
-	snd_assert(event >= SNDRV_TIMER_EVENT_MSTART &&
-		   event <= SNDRV_TIMER_EVENT_MRESUME, return);
+	if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART ||
+		       event > SNDRV_TIMER_EVENT_MRESUME))
+		return;
 	spin_lock_irqsave(&timer->lock, flags);
 	if (event == SNDRV_TIMER_EVENT_MSTART ||
 	    event == SNDRV_TIMER_EVENT_MCONTINUE ||
diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c
index 5512f5373c5..e05802ae6e1 100644
--- a/sound/core/timer_compat.c
+++ b/sound/core/timer_compat.c
@@ -40,9 +40,11 @@ static int snd_timer_user_info_compat(struct file *file,
 	struct snd_timer *t;
 
 	tu = file->private_data;
-	snd_assert(tu->timeri != NULL, return -ENXIO);
+	if (snd_BUG_ON(!tu->timeri))
+		return -ENXIO;
 	t = tu->timeri->timer;
-	snd_assert(t != NULL, return -ENXIO);
+	if (snd_BUG_ON(!t))
+		return -ENXIO;
 	memset(&info, 0, sizeof(info));
 	info.card = t->card ? t->card->number : -1;
 	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
@@ -71,7 +73,8 @@ static int snd_timer_user_status_compat(struct file *file,
 	struct snd_timer_status status;
 	
 	tu = file->private_data;
-	snd_assert(tu->timeri != NULL, return -ENXIO);
+	if (snd_BUG_ON(!tu->timeri))
+		return -ENXIO;
 	memset(&status, 0, sizeof(status));
 	status.tstamp = tu->tstamp;
 	status.resolution = snd_timer_resolution(tu->timeri);