From 79721c4957171ea0fdaf1fa6565e7699dad1b76e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Aug 2008 10:47:41 +0200 Subject: v4l2-dev: add video_device_release_empty From: Hans Verkuil 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. Priority: normal Signed-off-by: Hans Verkuil --- linux/drivers/media/video/v4l2-dev.c | 7 +++++++ linux/include/media/v4l2-dev.h | 5 +++++ 2 files changed, 12 insertions(+) (limited to 'linux') diff --git a/linux/drivers/media/video/v4l2-dev.c b/linux/drivers/media/video/v4l2-dev.c index e2cecec6e..0a4f9085b 100644 --- a/linux/drivers/media/video/v4l2-dev.c +++ b/linux/drivers/media/video/v4l2-dev.c @@ -91,6 +91,13 @@ 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); + #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) static void video_release(struct class_device *cd) #else diff --git a/linux/include/media/v4l2-dev.h b/linux/include/media/v4l2-dev.h index cee043d6a..b6f00b933 100644 --- a/linux/include/media/v4l2-dev.h +++ b/linux/include/media/v4l2-dev.h @@ -95,7 +95,12 @@ 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. */ -- cgit v1.2.3