[TG3]: Add tg3_netif_stop() in vlan functions

Add tg3_netif_stop() when changing the vlgrp (vlan group) pointer. It
is necessary to quiesce the device before changing that pointer.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -8738,6 +8738,9 @@ static void tg3_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
 {
 	struct tg3 *tp = netdev_priv(dev);
 
+	if (netif_running(dev))
+		tg3_netif_stop(tp);
+
 	tg3_full_lock(tp, 0);
 
 	tp->vlgrp = grp;
@@ -8746,16 +8749,25 @@ static void tg3_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
 	__tg3_set_rx_mode(dev);
 
 	tg3_full_unlock(tp);
+
+	if (netif_running(dev))
+		tg3_netif_start(tp);
 }
 
 static void tg3_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 {
 	struct tg3 *tp = netdev_priv(dev);
 
+	if (netif_running(dev))
+		tg3_netif_stop(tp);
+
 	tg3_full_lock(tp, 0);
 	if (tp->vlgrp)
 		tp->vlgrp->vlan_devices[vid] = NULL;
 	tg3_full_unlock(tp);
+
+	if (netif_running(dev))
+		tg3_netif_start(tp);
 }
 #endif