[PATCH] Major dvb net code cleanup, many fixes

 - code review and fix the old race condition in dev->set_multicast_list
 - use tq_schedule instead of tq_immediate
 - remove card_num and dev_num from struct dvb_net (now obsolete)
 - prevent interface from being removed while it is in use
 - allow add/remove only for the superuser
 - set check-CRC flag on section filter to drop broken packets
 - some more debug printfs in filter handling code
 - cleaned up and commented packet reception handler
 - fix formatting

drivers/media/dvb/dvb-core/dvb_net.h

@@ -35,8 +35,6 @@
 
 struct dvb_net {
 	struct dvb_device *dvbdev;
-	int card_num;
-	int dev_num;
 	struct net_device device[DVB_NET_DEVICES_MAX];
 	int state[DVB_NET_DEVICES_MAX];
 	struct dmx_demux *demux;