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[media] drivers/media/pci/saa7134/saa7134-dvb.c: Test if videobuf_dvb_get_frontend return NULL

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Based on commit: e66131cee5
Not testing videobuf_dvb_get_frontend output may cause OOPS if it return
NULL. This patch fixes this issue.
The semantic patch that found this issue is(http://coccinelle.lip6.fr/):
// <smpl>
@@
identifier i,a,b;
statement S, S2;
@@
i = videobuf_dvb_get_frontend(...);
... when != if (!i) S
* if (i->a.b)
S2
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Peter Senna Tschudin 2012-10-30 11:09:41 -03:00 committed by Mauro Carvalho Chehab
parent 832fbb5aec
commit 37e310edf3
1 changed files with 3 additions and 0 deletions
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3
drivers/media/pci/saa7134/saa7134-dvb.c
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@ -607,6 +607,9 @@ static int configure_tda827x_fe(struct saa7134_dev *dev,
/* Get the first frontend */
fe0 = videobuf_dvb_get_frontend(&dev->frontends, 1);
if (!fe0)
return -EINVAL;
fe0->dvb.frontend = dvb_attach(tda10046_attach, cdec_conf, &dev->i2c_adap);
if (fe0->dvb.frontend) {
if (cdec_conf->i2c_gate)