Hans Verkuil dfddb2441f [media] v4l2-fh: add v4l2_fh_is_singular ...

Several drivers need to do something when the first filehandle is opened
or the last filehandle is closed. Most implement some use count mechanism,
but if they use v4l2_fh, then you can also just check if this is the only
filehandle for the device node. A simple helper function can do this.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2011-03-22 16:37:58 -03:00

3.1 KiB

Raw Blame History

View Raw