[media] flexcop: handle errors from dvb_net_init

Bail out if dvb_net_init encounters an error (for example an
out-of-memory condition), now that it reports them.

[mchehab@redhat.com: CodingStyle fix: don't use  "if ((ret = foo()) < 0)"]
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/b2c2/flexcop.c

@@ -117,11 +117,17 @@ static int flexcop_dvb_init(struct flexcop_device *fc)
 		goto err_connect_frontend;
 	}
 
-	dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
+	ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
+	if (ret < 0) {
+		err("dvb_net_init failed: error %d", ret);
+		goto err_net;
+	}
 
 	fc->init_state |= FC_STATE_DVB_INIT;
 	return 0;
 
+err_net:
+	fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
 err_connect_frontend:
 	fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
 err_dmx_add_mem_frontend: