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V4L/DVB: video_ioctl2: do not replace arg with NULL for _IO() ioctls 

If the ioctl was defined without direction (e.g. _IO('o', 25)), then
the arg as passed to vidioc_default was NULL instead of the original
argument.

Several ioctls in e.g. include/linux/dvb/video.h and audio.h use this type
of ioctl to pass simple numerical values to the driver.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2010-04-06 08:12:21 -03:00 committed by Mauro Carvalho Chehab
parent ea64f8c220
commit 1d94aa369d
1 changed files with 1 additions and 1 deletions
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2
drivers/media/video/v4l2-ioctl.c
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@ -2006,7 +2006,7 @@ long video_ioctl2(struct file *file,
{ {
char sbuf[128]; char sbuf[128];
void *mbuf = NULL; void *mbuf = NULL;
void *parg = NULL; void *parg = (void *)arg;
long err = -EINVAL; long err = -EINVAL;
int is_ext_ctrl; int is_ext_ctrl;
size_t ctrls_size = 0; size_t ctrls_size = 0;