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[media] v4l2-ctrls: Fix control enumeration for multiple subdevs with ctrl 

v4l2-ctl and qv4l2 enumerate controls using V4L2_CTRL_FLAG_NEXT_CTRL,
falling back to the old method if the flag isn't supported.

The v4l2_subdev_queryctrl function will currently handle that flag, but
for the controls of the subdev only. This isn't right, it should refuse
this flag, otherwise v4l2-ctl will only see the controls of the first
subdev.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-02-22 12:31:07 -03:00 committed by Mauro Carvalho Chehab
parent fb8decfabd
commit 87a0c94ce6
1 changed files with 2 additions and 0 deletions
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2
drivers/media/video/v4l2-ctrls.c
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@ -1364,6 +1364,8 @@ EXPORT_SYMBOL(v4l2_queryctrl);
int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
return -EINVAL;
return v4l2_queryctrl(sd->ctrl_handler, qc);
}
EXPORT_SYMBOL(v4l2_subdev_queryctrl);