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Diffstat (limited to 'sound/core/timer.c')
-rw-r--r--sound/core/timer.c103
1 files changed, 67 insertions, 36 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index fa762ca439b..cfaccd415b3 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
+#include <linux/string.h>
#include <sound/core.h>
#include <sound/timer.h>
#include <sound/control.h>
@@ -69,6 +70,7 @@ typedef struct {
struct timespec tstamp; /* trigger tstamp */
wait_queue_head_t qchange_sleep;
struct fasync_struct *fasync;
+ struct semaphore tread_sem;
} snd_timer_user_t;
/* list of timers */
@@ -99,7 +101,7 @@ static snd_timer_instance_t *snd_timer_instance_new(char *owner, snd_timer_t *ti
timeri = kcalloc(1, sizeof(*timeri), GFP_KERNEL);
if (timeri == NULL)
return NULL;
- timeri->owner = snd_kmalloc_strdup(owner, GFP_KERNEL);
+ timeri->owner = kstrdup(owner, GFP_KERNEL);
if (! timeri->owner) {
kfree(timeri);
return NULL;
@@ -844,7 +846,7 @@ int snd_timer_dev_register(snd_device_t *dev)
return 0;
}
-int snd_timer_unregister(snd_timer_t *timer)
+static int snd_timer_unregister(snd_timer_t *timer)
{
struct list_head *p, *n;
snd_timer_instance_t *ti;
@@ -945,11 +947,6 @@ struct snd_timer_system_private {
unsigned long correction;
};
-unsigned int snd_timer_system_resolution(void)
-{
- return 1000000000L / HZ;
-}
-
static void snd_timer_s_function(unsigned long data)
{
snd_timer_t *timer = (snd_timer_t *)data;
@@ -1208,6 +1205,7 @@ static int snd_timer_user_open(struct inode *inode, struct file *file)
return -ENOMEM;
spin_lock_init(&tu->qlock);
init_waitqueue_head(&tu->qchange_sleep);
+ init_MUTEX(&tu->tread_sem);
tu->ticks = 1;
tu->queue_size = 128;
tu->queue = (snd_timer_read_t *)kmalloc(tu->queue_size * sizeof(snd_timer_read_t), GFP_KERNEL);
@@ -1454,46 +1452,51 @@ static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user *
snd_timer_user_t *tu;
snd_timer_select_t tselect;
char str[32];
- int err;
+ int err = 0;
tu = file->private_data;
- if (tu->timeri)
+ down(&tu->tread_sem);
+ if (tu->timeri) {
snd_timer_close(tu->timeri);
- if (copy_from_user(&tselect, _tselect, sizeof(tselect)))
- return -EFAULT;
+ tu->timeri = NULL;
+ }
+ if (copy_from_user(&tselect, _tselect, sizeof(tselect))) {
+ err = -EFAULT;
+ goto __err;
+ }
sprintf(str, "application %i", current->pid);
if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE)
tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION;
if ((err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid)) < 0)
- return err;
+ goto __err;
- if (tu->queue) {
- kfree(tu->queue);
- tu->queue = NULL;
- }
- if (tu->tqueue) {
- kfree(tu->tqueue);
- tu->tqueue = NULL;
- }
+ kfree(tu->queue);
+ tu->queue = NULL;
+ kfree(tu->tqueue);
+ tu->tqueue = NULL;
if (tu->tread) {
tu->tqueue = (snd_timer_tread_t *)kmalloc(tu->queue_size * sizeof(snd_timer_tread_t), GFP_KERNEL);
- if (tu->tqueue == NULL) {
- snd_timer_close(tu->timeri);
- return -ENOMEM;
- }
+ if (tu->tqueue == NULL)
+ err = -ENOMEM;
} else {
tu->queue = (snd_timer_read_t *)kmalloc(tu->queue_size * sizeof(snd_timer_read_t), GFP_KERNEL);
- if (tu->queue == NULL) {
- snd_timer_close(tu->timeri);
- return -ENOMEM;
- }
+ if (tu->queue == NULL)
+ err = -ENOMEM;
}
- tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST;
- tu->timeri->callback = tu->tread ? snd_timer_user_tinterrupt : snd_timer_user_interrupt;
- tu->timeri->ccallback = snd_timer_user_ccallback;
- tu->timeri->callback_data = (void *)tu;
- return 0;
+ if (err < 0) {
+ snd_timer_close(tu->timeri);
+ tu->timeri = NULL;
+ } else {
+ tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST;
+ tu->timeri->callback = tu->tread ? snd_timer_user_tinterrupt : snd_timer_user_interrupt;
+ tu->timeri->ccallback = snd_timer_user_ccallback;
+ tu->timeri->callback_data = (void *)tu;
+ }
+
+ __err:
+ up(&tu->tread_sem);
+ return err;
}
static int snd_timer_user_info(struct file *file, snd_timer_info_t __user *_info)
@@ -1669,6 +1672,23 @@ static int snd_timer_user_continue(struct file *file)
return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
}
+static int snd_timer_user_pause(struct file *file)
+{
+ int err;
+ snd_timer_user_t *tu;
+
+ tu = file->private_data;
+ snd_assert(tu->timeri != NULL, return -ENXIO);
+ return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0;
+}
+
+enum {
+ SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20),
+ SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21),
+ SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22),
+ SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
+};
+
static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
snd_timer_user_t *tu;
@@ -1685,11 +1705,17 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned l
{
int xarg;
- if (tu->timeri) /* too late */
+ down(&tu->tread_sem);
+ if (tu->timeri) { /* too late */
+ up(&tu->tread_sem);
return -EBUSY;
- if (get_user(xarg, p))
+ }
+ if (get_user(xarg, p)) {
+ up(&tu->tread_sem);
return -EFAULT;
+ }
tu->tread = xarg ? 1 : 0;
+ up(&tu->tread_sem);
return 0;
}
case SNDRV_TIMER_IOCTL_GINFO:
@@ -1707,11 +1733,17 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned l
case SNDRV_TIMER_IOCTL_STATUS:
return snd_timer_user_status(file, argp);
case SNDRV_TIMER_IOCTL_START:
+ case SNDRV_TIMER_IOCTL_START_OLD:
return snd_timer_user_start(file);
case SNDRV_TIMER_IOCTL_STOP:
+ case SNDRV_TIMER_IOCTL_STOP_OLD:
return snd_timer_user_stop(file);
case SNDRV_TIMER_IOCTL_CONTINUE:
+ case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
return snd_timer_user_continue(file);
+ case SNDRV_TIMER_IOCTL_PAUSE:
+ case SNDRV_TIMER_IOCTL_PAUSE_OLD:
+ return snd_timer_user_pause(file);
}
return -ENOTTY;
}
@@ -1898,4 +1930,3 @@ EXPORT_SYMBOL(snd_timer_global_free);
EXPORT_SYMBOL(snd_timer_global_register);
EXPORT_SYMBOL(snd_timer_global_unregister);
EXPORT_SYMBOL(snd_timer_interrupt);
-EXPORT_SYMBOL(snd_timer_system_resolution);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 01:17:43 +0000