diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/media/v4l2-device.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index 3b723283da26..bd102cf509ac 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h | |||
| @@ -60,8 +60,19 @@ struct v4l2_device { | |||
| 60 | struct v4l2_prio_state prio; | 60 | struct v4l2_prio_state prio; |
| 61 | /* BKL replacement mutex. Temporary solution only. */ | 61 | /* BKL replacement mutex. Temporary solution only. */ |
| 62 | struct mutex ioctl_lock; | 62 | struct mutex ioctl_lock; |
| 63 | /* Keep track of the references to this struct. */ | ||
| 64 | struct kref ref; | ||
| 65 | /* Release function that is called when the ref count goes to 0. */ | ||
| 66 | void (*release)(struct v4l2_device *v4l2_dev); | ||
| 63 | }; | 67 | }; |
| 64 | 68 | ||
| 69 | static inline void v4l2_device_get(struct v4l2_device *v4l2_dev) | ||
| 70 | { | ||
| 71 | kref_get(&v4l2_dev->ref); | ||
| 72 | } | ||
| 73 | |||
| 74 | int v4l2_device_put(struct v4l2_device *v4l2_dev); | ||
| 75 | |||
| 65 | /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev. | 76 | /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev. |
| 66 | dev may be NULL in rare cases (ISA devices). In that case you | 77 | dev may be NULL in rare cases (ISA devices). In that case you |
| 67 | must fill in the v4l2_dev->name field before calling this function. */ | 78 | must fill in the v4l2_dev->name field before calling this function. */ |