From 806e5b7cfa96195baadc4cc4663266aaac92e22b Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Fri, 19 Dec 2008 09:10:56 -0300
Subject: [PATCH] V4L/DVB (9942): v4l2-dev: check for parent device in
 get_index.

get_index requires a valid parent device in order to discover which
indices are in use. Some drivers (e.g. pvrusb2) do not set the parent
device. In that case just return 0.

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