Commit 84a1d9c8 authored by Michael Hunold's avatar Michael Hunold Committed by Mauro Carvalho Chehab

V4L/DVB: saa7146: fix up bytesperline if it is an impossible value

xawtv using DGA on a Radeon graphics card provides bogus
values to S_FBUF, which will then screw up overlay video:

https://bugs.launchpad.net/ubuntu/+source/xawtv/+bug/499734

This fixes the bytesperline value if it is off completely.
Signed-off-by: default avatarMichael Hunold <michael@mihu.de>
Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent ab51bec1
......@@ -558,9 +558,11 @@ static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *f
/* ok, accept it */
vv->ov_fb = *fb;
vv->ov_fmt = fmt;
if (0 == vv->ov_fb.fmt.bytesperline)
vv->ov_fb.fmt.bytesperline =
vv->ov_fb.fmt.width * fmt->depth / 8;
if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
DEB_D(("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline));
}
mutex_unlock(&dev->lock);
return 0;
......
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