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authorHans Verkuil <hverkuil@xs4all.nl>2008-08-23 05:47:41 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 09:36:54 -0200
commitf9e86b5e9d068854a2cf40f8003ef639e80cca6c (patch)
tree03b3ba79c4e099a6dcefd490e29d6310cc1d881a
parentcb353588e1946ab709be57dd8545598793acf912 (diff)
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.c7
-rw-r--r--include/media/v4l2-dev.h5
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 66bd74b58b0..fda48a2efda 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 e472b5d07a5..30855077be4 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. */