V4L/DVB (6031): Fix for bug 7819: fixed hotplugging for dvbnet

The first part of dvb_net_close() is just a cut&paste from
dvb_generic_release(), so maybe it would be better to just call
dvb_generic_release() instead?

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Markus Rechberger <mrechberger@gmail.com>
Acked-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

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

@@ -1441,16 +1441,7 @@ static int dvb_net_close(struct inode *inode, struct file *file)
 	struct dvb_device *dvbdev = file->private_data;
 	struct dvb_net *dvbnet = dvbdev->priv;
 
-	if (!dvbdev)
-		return -ENODEV;
-
-	if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
-		dvbdev->readers++;
-	} else {
-		dvbdev->writers++;
-	}
-
-	dvbdev->users++;
+	dvb_generic_release(inode, file);
 
 	if(dvbdev->users == 1 && dvbnet->exit == 1) {
 		fops_put(file->f_op);