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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2008-08-23 12:47:41 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 15:36:54 +0400 |
| commit | f9e86b5e9d068854a2cf40f8003ef639e80cca6c (patch) | |
| tree | 03b3ba79c4e099a6dcefd490e29d6310cc1d881a | |
| parent | cb353588e1946ab709be57dd8545598793acf912 (diff) | |
| download | linux-f9e86b5e9d068854a2cf40f8003ef639e80cca6c.tar.xz | |
V4L/DVB (8782): v4l2-dev: add video_device_release_empty
Add a second release function: video_device_release_empty
It can be used by drivers that have statically allocated
video_device structs.
Its use usually, but not always, indicates laziness on the
part of the driver programmer.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 7 | ||||
| -rw-r--r-- | include/media/v4l2-dev.h | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 66bd74b58b06..fda48a2efda6 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -73,6 +73,13 @@ void video_device_release(struct video_device *vfd) } EXPORT_SYMBOL(video_device_release); +void video_device_release_empty(struct video_device *vfd) +{ + /* Do nothing */ + /* Only valid when the video_device struct is a static. */ +} +EXPORT_SYMBOL(video_device_release_empty); + static void video_release(struct device *cd) { struct video_device *vfd = container_of(cd, struct video_device, dev); diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index e472b5d07a55..30855077be44 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -91,7 +91,12 @@ void video_unregister_device(struct video_device *); /* helper functions to alloc / release struct video_device, the later can be used for video_device->release() */ struct video_device *video_device_alloc(void); +/* this release function frees the vfd pointer */ void video_device_release(struct video_device *vfd); +/* this release function does nothing, use when the video_device is a + static global struct. Note that having a static video_device is + a dubious construction at best. */ +void video_device_release_empty(struct video_device *vfd); #ifdef OBSOLETE_DEVDATA /* to be removed soon */ /* helper functions to access driver private data. */ |