From 806e5b7cfa96195baadc4cc4663266aaac92e22b Mon Sep 17 00:00:00 2001 From: Hans Verkuil 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/v4l2-dev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 682f48aadca..c5ca51a9020 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -162,6 +162,10 @@ static int get_index(struct video_device *vdev, int num) return -EINVAL; } + /* Some drivers do not set the parent. In that case always return 0. */ + if (vdev->parent == NULL) + return 0; + for (i = 0; i < VIDEO_NUM_DEVICES; i++) { if (video_device[i] != NULL && video_device[i] != vdev && -- 2.41.1