From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Date: Tue, 28 Apr 2015 13:02:07 +0000 (-0300)
Subject: [media] ngene: preventing dereferencing a NULL pointer
X-Git-Tag: v4.2-rc1~107^2~528
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5a4faee2d01b615011ceb65c656250e4e6a274ee;p=karo-tx-linux.git

[media] ngene: preventing dereferencing a NULL pointer

As reported by smatch:
	drivers/media/pci/ngene/ngene-core.c:1529 init_channel() error: we previously assumed 'chan->fe' could be null (see line 1521)

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c
index e29bc3af4baf..1b92d836a564 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -1526,10 +1526,12 @@ static int init_channel(struct ngene_channel *chan)
 	if (chan->fe2) {
 		if (dvb_register_frontend(adapter, chan->fe2) < 0)
 			goto err;
-		chan->fe2->tuner_priv = chan->fe->tuner_priv;
-		memcpy(&chan->fe2->ops.tuner_ops,
-		       &chan->fe->ops.tuner_ops,
-		       sizeof(struct dvb_tuner_ops));
+		if (chan->fe) {
+			chan->fe2->tuner_priv = chan->fe->tuner_priv;
+			memcpy(&chan->fe2->ops.tuner_ops,
+			       &chan->fe->ops.tuner_ops,
+			       sizeof(struct dvb_tuner_ops));
+		}
 	}
 
 	if (chan->has_demux) {