From: Miroslav Slugen <thunder.mmm@gmail.com>
Date: Sun, 11 Dec 2011 21:57:58 +0000 (-0300)
Subject: cx23885-dvb: check if dvb_attach() succeded
X-Git-Tag: v3.2.2~21
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=60dfee83be0262141968a4ee6b48786bc5767073;p=karo-tx-linux.git

cx23885-dvb: check if dvb_attach() succeded

commit a7c8aadad39428b64d26c3971d967f8314e2397d upstream.

Fix possible null dereference for Leadtek DTV 3200H
XC4000 tuner when no firmware file available.

Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index bcb45be44bb2..f0482b2d50f1 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -940,6 +940,11 @@ static int dvb_register(struct cx23885_tsport *port)
 
 			fe = dvb_attach(xc4000_attach, fe0->dvb.frontend,
 					&dev->i2c_bus[1].i2c_adap, &cfg);
+			if (!fe) {
+				printk(KERN_ERR "%s/2: xc4000 attach failed\n",
+				       dev->name);
+				goto frontend_detach;
+			}
 		}
 		break;
 	case CX23885_BOARD_TBS_6920: