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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2017-03-30 09:05:25 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-04-10 07:27:09 -0300 |
| commit | ba7ed691dcce1a4921ea92b8bf75af52f5e504f6 (patch) | |
| tree | 43547c2e00aa658291e15447545b2cf51111bcdb /drivers/media/v4l2-core | |
| parent | 3369cde0afc1e6aa405768ccc83a406d385055ea (diff) | |
| download | linux-stable-ba7ed691dcce1a4921ea92b8bf75af52f5e504f6.tar.gz linux-stable-ba7ed691dcce1a4921ea92b8bf75af52f5e504f6.tar.bz2 linux-stable-ba7ed691dcce1a4921ea92b8bf75af52f5e504f6.zip | |
[media] v4l2-compat-ioctl32: VIDIOC_S_EDID should return all fields on error
Most ioctls do not have to write back the contents of the argument
if an error is returned. But VIDIOC_S_EDID is an exception together
with the EXT_CTRLS ioctls (already handled correctly).
Add this exception to v4l2-compat-ioctl32.
This fixes a compliance error when using compat32 and trying to
set a new EDID with more blocks than the hardware supports. In
that case the driver will return -E2BIG and set edid.blocks to the
actual maximum number of blocks. This field was never copied back
to userspace due to this bug.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index eac9565dc3d8..77b8a2dcfcdf 100644 --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -990,6 +990,10 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar if (put_v4l2_ext_controls32(&karg.v2ecs, up)) err = -EFAULT; break; + case VIDIOC_S_EDID: + if (put_v4l2_edid32(&karg.v2edid, up)) + err = -EFAULT; + break; } if (err) return err; @@ -1011,7 +1015,6 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar break; case VIDIOC_G_EDID: - case VIDIOC_S_EDID: err = put_v4l2_edid32(&karg.v2edid, up); break; |