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authorClemens Ladisch <clemens@ladisch.de>2005-10-12 17:12:31 +0200
committerJaroslav Kysela <perex@suse.cz>2005-11-04 13:18:43 +0100
commitde24214d0c8e78134875752619f99b9e5824c196 (patch)
tree147f8cdcf5dfb3be2d95409f7ac44af101d2e0a5 /sound
parent2fd43d1159d22395aae01836c4b13ee5265a9b6b (diff)
[ALSA] timers: add module refcounting for global timers
Modules: RTC timer driver,Timer Midlevel Add a module pointer to the timer structure and use it for refcounting instead of the card's module pointer to prevent the global timer modules (rtctimer and hpetimer) from being removed while in use. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/rtctimer.c4
-rw-r--r--sound/core/timer.c7
2 files changed, 7 insertions, 4 deletions
diff --git a/sound/core/rtctimer.c b/sound/core/rtctimer.c
index 8762ff8938c..c3c18568207 100644
--- a/sound/core/rtctimer.c
+++ b/sound/core/rtctimer.c
@@ -124,7 +124,8 @@ static int __init rtctimer_init(void)
if (rtctimer_freq < 2 || rtctimer_freq > 8192 ||
(rtctimer_freq & (rtctimer_freq - 1)) != 0) {
- snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n", rtctimer_freq);
+ snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n",
+ rtctimer_freq);
return -EINVAL;
}
@@ -133,6 +134,7 @@ static int __init rtctimer_init(void)
if (err < 0)
return err;
+ timer->module = THIS_MODULE;
strcpy(timer->name, "RTC timer");
timer->hw = rtc_hw;
timer->hw.resolution = NANO_SEC / rtctimer_freq;
diff --git a/sound/core/timer.c b/sound/core/timer.c
index b02681eaea7..c8496c7b8df 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -113,7 +113,7 @@ static snd_timer_instance_t *snd_timer_instance_new(char *owner, snd_timer_t *ti
INIT_LIST_HEAD(&timeri->slave_active_head);
timeri->timer = timer;
- if (timer && timer->card && !try_module_get(timer->card->module)) {
+ if (timer && !try_module_get(timer->module)) {
kfree(timeri->owner);
kfree(timeri);
return NULL;
@@ -363,8 +363,8 @@ int snd_timer_close(snd_timer_instance_t * timeri)
timeri->private_free(timeri);
kfree(timeri->owner);
kfree(timeri);
- if (timer && timer->card)
- module_put(timer->card->module);
+ if (timer)
+ module_put(timer->module);
return 0;
}
@@ -787,6 +787,7 @@ int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, snd_timer_t *
spin_lock_init(&timer->lock);
tasklet_init(&timer->task_queue, snd_timer_tasklet, (unsigned long)timer);
if (card != NULL) {
+ timer->module = card->module;
if ((err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops)) < 0) {
snd_timer_free(timer);
return err;