diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-alsa.h')
| -rw-r--r-- | drivers/media/video/cx18/cx18-alsa.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-alsa.h b/drivers/media/video/cx18/cx18-alsa.h index 2546779b731..88a1cde7540 100644 --- a/drivers/media/video/cx18/cx18-alsa.h +++ b/drivers/media/video/cx18/cx18-alsa.h @@ -32,6 +32,22 @@ struct snd_cx18_card { extern int cx18_alsa_debug; +/* + * File operations that manipulate the encoder or video or audio subdevices + * need to be serialized. Use the same lock we use for v4l2 file ops. + */ +static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) +{ + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + mutex_lock(&cx->serialize_lock); +} + +static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) +{ + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + mutex_unlock(&cx->serialize_lock); +} + #define CX18_ALSA_DBGFLG_WARN (1 << 0) #define CX18_ALSA_DBGFLG_WARN (1 << 0) #define CX18_ALSA_DBGFLG_INFO (1 << 1) |