From f3b9f50ef771670b5d94c568241d6766691c6c18 Mon Sep 17 00:00:00 2001
From: Henrik Kretzschmar <henne@nachtwindheim.de>
Date: Wed, 3 Sep 2008 17:11:53 -0300
Subject: [PATCH] V4L/DVB (8750): V4L: check inval in
 video_register_device_index()

Better check the video_device pointer before using it.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
 drivers/media/video/v4l2-dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 0320fb84119c..155fdec9ac7d 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -257,6 +257,9 @@ int video_register_device_index(struct video_device *vfd, int type, int nr,
 	int ret;
 	char *name_base;
 
+	if (vfd == NULL)
+		return -EINVAL;
+
 	switch (type) {
 	case VFL_TYPE_GRABBER:
 		base = MINOR_VFL_TYPE_GRABBER_MIN;