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Commit ac9dd9d3 authored by Mark Hills's avatar Mark Hills Committed by Takashi Iwai
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ALSA: snd-usb-caiaq: Lock on stream start/unpause 



Fix a bug which can result in white noise from the driver after stream
start or unpause.

Signed-off-by: default avatarMark Hills <mark@pogo.org.uk>
Acked-by: default avatarDaniel Mack <daniel@caiaq.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3702b082

sound/usb/caiaq/audio.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -62,10 +62,14 @@ static void 
activate_substream(struct snd_usb_caiaqdev *dev,

activate_substream(struct snd_usb_caiaqdev *dev,

	           struct snd_pcm_substream *sub)

	           struct snd_pcm_substream *sub)

{

{

	spin_lock(&dev->spinlock);



	if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)

	if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)

		dev->sub_playback[sub->number] = sub;

		dev->sub_playback[sub->number] = sub;

	else

	else

		dev->sub_capture[sub->number] = sub;

		dev->sub_capture[sub->number] = sub;



	spin_unlock(&dev->spinlock);

}

}





static void

static void