Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f9e86b...
Commit: f9e86b5e9d068854a2cf40f8003ef639e80cca6c
Parent: cb353588e1946ab709be57dd8545598793acf912
Author: Hans Verkuil <hverkuil@xs4all.nl>
AuthorDate: Sat Aug 23 05:47:41 2008 -0300
Committer: Mauro Carvalho Chehab <mchehab@redhat.com>
CommitDate: Sun Oct 12 09:36:54 2008 -0200
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>
---
drivers/media/video/v4l2-dev.c | 7 +++++++
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 66bd74b..fda48a2 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 e472b5d..3085507 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. */
--
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