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V4L/DVB (12725): v4l: warn when desired devnodenr is in use & add _no_warn function

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Warn when the desired device node number is already in use, except when
the new video_register_device_no_warn function is called since in some
use-cases that warning is not relevant.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2009-09-06 07:54:00 -03:00 • committed by Mauro Carvalho Chehab
parent 5062cb70c8
commit 6b5270d212
5 changed files with 40 additions and 8 deletions
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4
include/media/v4l2-dev.h
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@ -101,6 +101,10 @@ struct video_device
Also note that vdev->minor is set to -1 if the registration failed. */
int __must_check video_register_device(struct video_device *vdev, int type, int nr);
/* Same as video_register_device, but no warning is issued if the desired
device node number was already in use. */
int __must_check video_register_device_no_warn(struct video_device *vdev, int type, int nr);
/* Unregister video devices. Will do nothing if vdev == NULL or
vdev->minor < 0. */
void video_unregister_device(struct video_device *vdev);