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[ALSA] pcsp: locking fix 

pcsp: locking fix.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Stas Sergeev 2008-03-12 13:12:15 +01:00 committed by Takashi Iwai
parent bb9f76cd59
commit 1bc1f30565
2 changed files with 4 additions and 3 deletions
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5
sound/drivers/pcsp/pcsp.c
View File

@ -191,11 +191,10 @@ static int __devexit pcsp_remove(struct platform_device *dev)
static void pcsp_stop_beep(struct snd_pcsp *chip) static void pcsp_stop_beep(struct snd_pcsp *chip)
{ {
unsigned long flags; spin_lock_irq(&chip->substream_lock);
spin_lock_irqsave(&chip->substream_lock, flags);
if (!chip->playback_substream) if (!chip->playback_substream)
pcspkr_stop_sound(); pcspkr_stop_sound();
spin_unlock_irqrestore(&chip->substream_lock, flags); spin_unlock_irq(&chip->substream_lock);
} }
static int pcsp_suspend(struct platform_device *dev, pm_message_t state) static int pcsp_suspend(struct platform_device *dev, pm_message_t state)

2
sound/drivers/pcsp/pcsp_lib.c
View File

@ -305,7 +305,9 @@ static int snd_pcsp_playback_open(struct snd_pcm_substream *substream)
return -EBUSY; return -EBUSY;
} }
runtime->hw = snd_pcsp_playback; runtime->hw = snd_pcsp_playback;
spin_lock_irq(&chip->substream_lock);
chip->playback_substream = substream; chip->playback_substream = substream;
spin_unlock_irq(&chip->substream_lock);
return 0; return 0;
} }