diff options
| author | Douglas Schilling Landgraf <dougsland@redhat.com> | 2009-02-08 07:11:13 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 19:42:44 +0400 |
| commit | bf510ac380c0e5aac813455fdf7364613cf75b72 (patch) | |
| tree | 6d72328d2d26cff463258e849eebabd7534cecba /drivers/media/video/em28xx/em28xx-audio.c | |
| parent | df39ca6437410b9428ebd3ce30fcde193782410d (diff) | |
| download | linux-bf510ac380c0e5aac813455fdf7364613cf75b72.tar.xz | |
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>
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-audio.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-audio.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c index 8e9957dbdbec..38436af2164b 100644 --- a/drivers/media/video/em28xx/em28xx-audio.c +++ b/drivers/media/video/em28xx/em28xx-audio.c @@ -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 @@ err: 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); |