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Commit df39ca64 authored by Douglas Schilling Landgraf's avatar Douglas Schilling Landgraf Committed by Mauro Carvalho Chehab
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V4L/DVB (10520): em28xx-audio: Add spinlock for trigger 



Added spinlock for trigger session

Signed-off-by: default avatarDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent c744dff2

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

+11 −3
Original line number Diff line number Diff line
@@ -381,19 +381,27 @@ static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream, 
				      int cmd)

{

	struct em28xx *dev = snd_pcm_substream_chip(substream);

	int retval;



	dprintk("Should %s capture\n", (cmd == SNDRV_PCM_TRIGGER_START)?

				       "start": "stop");



	spin_lock(&dev->adev.slock);

	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

		em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 1);

		return 0;

		retval = 0;

		break;

	case SNDRV_PCM_TRIGGER_STOP:

		em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);

		return 0;

		retval = 0;

		break;

	default:

		return -EINVAL;

		retval = -EINVAL;

	}



	spin_unlock(&dev->adev.slock);

	return retval;

}



static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream