[media] Don't OOPS if videobuf_dvb_get_frontend return NULL

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index ad2fd13..aa83f07 100644 (file)
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -1270,7 +1270,7 @@ int cx23885_dvb_unregister(struct cx23885_tsport *port)
         * implement MFE support.
         */
        fe0 = videobuf_dvb_get_frontend(&port->frontends, 1);
-       if (fe0->dvb.frontend)
+       if (fe0 && fe0->dvb.frontend)
                videobuf_dvb_unregister_bus(&port->frontends);
 
        switch (port->dev->board) {