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V4L/DVB (10521): em28xx-audio: Add lock for users
Added lock for users count Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -313,7 +313,9 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
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dprintk("changing alternate number to 7\n");
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dprintk("changing alternate number to 7\n");
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}
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}
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mutex_lock(&dev->lock);
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dev->adev.users++;
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dev->adev.users++;
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mutex_unlock(&dev->lock);
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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dev->adev.capture_pcm_substream = substream;
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dev->adev.capture_pcm_substream = substream;
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@ -328,12 +330,12 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
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static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
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static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
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{
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{
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struct em28xx *dev = snd_pcm_substream_chip(substream);
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struct em28xx *dev = snd_pcm_substream_chip(substream);
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dev->adev.users--;
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dprintk("closing device\n");
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dprintk("closing device\n");
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dev->mute = 1;
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dev->mute = 1;
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mutex_lock(&dev->lock);
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mutex_lock(&dev->lock);
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dev->adev.users--;
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em28xx_audio_analog_set(dev);
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em28xx_audio_analog_set(dev);
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mutex_unlock(&dev->lock);
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mutex_unlock(&dev->lock);
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