V4L/DVB (7624): Avoid an oops if the board is not fully defined

Avoid an oops if the board is not fully defined.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/video/au0828/au0828-dvb.c b/drivers/media/video/au0828/au0828-dvb.c
index 3c8a29eafc2d..ecc08a8e31ca 100644
--- a/drivers/media/video/au0828/au0828-dvb.c
+++ b/drivers/media/video/au0828/au0828-dvb.c
@@ -57,6 +57,9 @@ static void urb_completion(struct urb *purb)
         struct au0828_dev *dev = purb->context;
         int ptype = usb_pipetype(purb->pipe);
 
+        if (!dev)
+                return;
+
         if (dev->urb_streaming == 0)
                 return;
 
@@ -310,6 +313,9 @@ void au0828_dvb_unregister(struct au0828_dev *dev)
 {
         struct au0828_dvb *dvb = &dev->dvb;
 
+        if(dvb->frontend == NULL)
+                return;
+
         dvb_net_release(&dvb->net);
         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);