diff options
| author | Takashi Iwai <tiwai@suse.de> | 2005-11-18 18:52:14 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-01-03 12:29:08 +0100 |
| commit | b32425ac93370e1ba5556110e662f896b2e143b3 (patch) | |
| tree | c5837ee90c16d2aa358e399f2ad79ca4eb770e94 /sound/core/timer.c | |
| parent | 2eb061f41cf74f829bfe90a9c79c765172be9f0b (diff) | |
| download | lwn-b32425ac93370e1ba5556110e662f896b2e143b3.tar.gz lwn-b32425ac93370e1ba5556110e662f896b2e143b3.zip | |
[ALSA] Fix possible races in timer callbacks
Fix possible races in timer callbacks.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/timer.c')
| -rw-r--r-- | sound/core/timer.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c index 74637cef6d2c..6aad411dd7b8 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -662,12 +662,13 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) struct snd_timer_instance *ti, *ts; unsigned long resolution, ticks; struct list_head *p, *q, *n, *ack_list_head; + unsigned long flags; int use_tasklet = 0; if (timer == NULL) return; - spin_lock(&timer->lock); + spin_lock_irqsave(&timer->lock, flags); /* remember the current resolution */ if (timer->hw.c_resolution) @@ -752,7 +753,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) /* do we have any slow callbacks? */ use_tasklet = !list_empty(&timer->sack_list_head); - spin_unlock(&timer->lock); + spin_unlock_irqrestore(&timer->lock, flags); if (use_tasklet) tasklet_hi_schedule(&timer->task_queue); |