From b32425ac93370e1ba5556110e662f896b2e143b3 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 18 Nov 2005 18:52:14 +0100 Subject: [ALSA] Fix possible races in timer callbacks Fix possible races in timer callbacks. Signed-off-by: Takashi Iwai --- sound/core/timer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'sound/core') diff --git a/sound/core/timer.c b/sound/core/timer.c index 74637cef6d2..6aad411dd7b 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); -- cgit v1.2.3