diff options
| author | Douglas Schilling Landgraf <dougsland@redhat.com> | 2009-02-08 14:17:15 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:42:44 -0300 |
| commit | df39ca6437410b9428ebd3ce30fcde193782410d (patch) | |
| tree | 52693d3610f66915809ad075ca72c1446fe544d1 | |
| parent | c744dff260e9efb1080d1e823e588f85176a057b (diff) | |
V4L/DVB (10520): em28xx-audio: Add spinlock for trigger
Added spinlock for trigger session
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-audio.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c index 52c6657d61c..8e9957dbdbe 100644 --- a/drivers/media/video/em28xx/em28xx-audio.c +++ b/drivers/media/video/em28xx/em28xx-audio.c @@ -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 |