V4L/DVB (7537): cx88/saa7134: Fix: avoid OOPS on module unload

If frontend is not attached, both cx88-dvb and saa7134-dvb don't
register DVB. However, dvb unregister were inconditionally called.

Due to that, an OOPS is generated.

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

diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 8fc929e..e83d986 100644 (file)
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -951,7 +951,8 @@ static int cx8802_dvb_remove(struct cx8802_driver *drv)
        struct cx8802_dev *dev = drv->core->dvbdev;
 
        /* dvb */
-       videobuf_dvb_unregister(&dev->dvb);
+       if (dev->dvb.frontend)
+               videobuf_dvb_unregister(&dev->dvb);
 
        vp3054_i2c_remove(dev);
 

diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c
index 5c84f45..e5c3569 100644 (file)
--- a/drivers/media/video/saa7134/saa7134-dvb.c
+++ b/drivers/media/video/saa7134/saa7134-dvb.c
@@ -1302,7 +1302,8 @@ static int dvb_fini(struct saa7134_dev *dev)
                        }
                }
        }
-       videobuf_dvb_unregister(&dev->dvb);
+       if (dev->dvb.frontend)
+               videobuf_dvb_unregister(&dev->dvb);
        return 0;
 }