From: Steven Toth <stoth@hauppauge.com>
Date: Wed, 27 Sep 2006 04:16:50 +0000 (-0300)
Subject: V4L/DVB (4679): Fix for NULL pointer dereference oops during boot.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=76ac5dd6c055101ef9f8c6349cae4ef571039e93;p=linux-beck.git

V4L/DVB (4679): Fix for NULL pointer dereference oops during boot.

A fix for intermittent oops's during boot which occurs
in cx88_call_i2c_clients when dvb_attach is bringing up
the frontend.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---

diff --git a/drivers/media/video/cx88/cx88-i2c.c b/drivers/media/video/cx88/cx88-i2c.c
index 6e705a2afdf8..88af23a93870 100644
--- a/drivers/media/video/cx88/cx88-i2c.c
+++ b/drivers/media/video/cx88/cx88-i2c.c
@@ -145,7 +145,7 @@ void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
 	if (0 != core->i2c_rc)
 		return;
 
-	if (core->dvbdev) {
+	if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
 		if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
 			core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);