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ALSA: timer: Sync timer deletion at closing the system timer
ALSA timer core framework has no sync point at stopping because it's called inside the spinlock. Thus we need a sync point at close for avoiding the stray timer task. This is simply done by implementing the close callback just calling del_timer_sync(). (It's harmless to call it unconditionally, as the core timer itself cares of the already deleted timer instance.) Signed-off-by: Takashi Iwai <tiwai@suse.de>
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1 changed files with 10 additions and 0 deletions
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@ -1058,11 +1058,21 @@ static int snd_timer_s_stop(struct snd_timer * timer)
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return 0;
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return 0;
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}
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}
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static int snd_timer_s_close(struct snd_timer *timer)
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{
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struct snd_timer_system_private *priv;
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priv = (struct snd_timer_system_private *)timer->private_data;
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del_timer_sync(&priv->tlist);
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return 0;
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}
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static struct snd_timer_hardware snd_timer_system =
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static struct snd_timer_hardware snd_timer_system =
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{
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{
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.flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET,
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.flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET,
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.resolution = 1000000000L / HZ,
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.resolution = 1000000000L / HZ,
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.ticks = 10000000L,
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.ticks = 10000000L,
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.close = snd_timer_s_close,
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.start = snd_timer_s_start,
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.start = snd_timer_s_start,
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.stop = snd_timer_s_stop
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.stop = snd_timer_s_stop
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};
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};
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