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[ALSA] Fix a deadlock in snd-rtctimer

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Fix a occasional deadlock occuring with snd-rtctimer driver,
added irqsave to the lock in tasklet (ALSA bug#952).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2006-07-05 17:16:58 +02:00 committed by Jaroslav Kysela
parent f40b68903c
commit 2999ff5ba1
1 changed files with 3 additions and 2 deletions
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5
sound/core/timer.c
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@ -628,8 +628,9 @@ static void snd_timer_tasklet(unsigned long arg)
struct snd_timer_instance *ti;
struct list_head *p;
unsigned long resolution, ticks;
unsigned long flags;
spin_lock(&timer->lock);
spin_lock_irqsave(&timer->lock, flags);
/* now process all callbacks */
while (!list_empty(&timer->sack_list_head)) {
p = timer->sack_list_head.next; /* get first item */
@ -649,7 +650,7 @@ static void snd_timer_tasklet(unsigned long arg)
spin_lock(&timer->lock);
ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
}
spin_unlock(&timer->lock);
spin_unlock_irqrestore(&timer->lock, flags);
}
/*