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[ALSA] Fix possible races in timer callbacks

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Fix possible races in timer callbacks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2005-11-18 18:52:14 +01:00
committed by Jaroslav Kysela
parent 2eb061f41c
commit b32425ac93
6 changed files with 20 additions and 15 deletions
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5
sound/drivers/opl3/opl3_midi.c
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@@ -238,10 +238,11 @@ void snd_opl3_timer_func(unsigned long data)
{
struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
unsigned long flags;
int again = 0;
int i;
spin_lock(&opl3->sys_timer_lock);
spin_lock_irqsave(&opl3->sys_timer_lock, flags);
for (i = 0; i < opl3->max_voices; i++) {
struct snd_opl3_voice *vp = &opl3->voices[i];
if (vp->state > 0 && vp->note_off_check) {
@@ -257,7 +258,7 @@ void snd_opl3_timer_func(unsigned long data)
} else {
opl3->sys_timer_status = 0;
}
spin_unlock(&opl3->sys_timer_lock);
spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
}
/*