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Commit bf510ac3 authored by Douglas Schilling Landgraf's avatar Douglas Schilling Landgraf Committed by Mauro Carvalho Chehab
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V4L/DVB (10521): em28xx-audio: Add lock for users 



Added lock for users count

Signed-off-by: default avatarDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent df39ca64

drivers/media/video/em28xx/em28xx-audio.c

+3 −1
Original line number Diff line number Diff line
@@ -313,7 +313,9 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream) 
		dprintk("changing alternate number to 7\n");

	}



	mutex_lock(&dev->lock);

	dev->adev.users++;

	mutex_unlock(&dev->lock);



	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);

	dev->adev.capture_pcm_substream = substream;
@@ -328,12 +330,12 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream) 
static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)

{

	struct em28xx *dev = snd_pcm_substream_chip(substream);

	dev->adev.users--;



	dprintk("closing device\n");



	dev->mute = 1;

	mutex_lock(&dev->lock);

	dev->adev.users--;

	em28xx_audio_analog_set(dev);

	mutex_unlock(&dev->lock);