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V4L/DVB (5569): Fix: v4l1_compat should be called only if V4L1_COMPAT

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Added also some explanations about V4L1 handling

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2007-05-01 08:55:00 -03:00
parent 1088b13735
commit 452c0fb46b
1 changed files with 13 additions and 1 deletions
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14
drivers/media/video/videodev.c
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@ -438,6 +438,12 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
}
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/***********************************************************
Handles calls to the obsoleted V4L1 API
Due to the nature of VIDIOCGMBUF, each driver that supports
V4L1 should implement its own handler for this ioctl.
***********************************************************/
/* --- streaming capture ------------------------------------- */
if (cmd == VIDIOCGMBUF) {
struct video_mbuf *p=arg;
@ -453,11 +459,17 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
(unsigned long)p->offsets);
return ret;
}
#endif
/********************************************************
All other V4L1 calls are handled by v4l1_compat module.
Those calls will be translated into V4L2 calls, and
__video_do_ioctl will be called again, with one or more
V4L2 ioctls.
********************************************************/
if (_IOC_TYPE(cmd)=='v')
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
__video_do_ioctl);
#endif
switch(cmd) {
/* --- capabilities ------------------------------------------ */