V4L/DVB (8005): Fix OOPS if frontend is null

Thanks to timf <timf@iinet.net.au> and Mike Galbraith <efault@gmx.de> to report
this issue.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c
index 469f93aac008..726f01ccedf0 100644
--- a/drivers/media/video/saa7134/saa7134-dvb.c
+++ b/drivers/media/video/saa7134/saa7134-dvb.c
@@ -1338,7 +1338,8 @@ static int dvb_init(struct saa7134_dev *dev)
         return ret;
 
 dettach_frontend:
-        dvb_frontend_detach(dev->dvb.frontend);
+        if (dev->dvb.frontend)
+                dvb_frontend_detach(dev->dvb.frontend);
         dev->dvb.frontend = NULL;
 
         return -1;