tg3: Refine tg3_vlan_rx_register()

tg3_vlan_rx_register() touches the hardware if netif_running() returns
false.  This patch fixes the problem.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 0ea61f7f6203..ce29097cc759 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -9896,8 +9896,12 @@ 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);
+        if (!netif_running(dev)) {
+                tp->vlgrp = grp;
+                return;
+        }
+
+        tg3_netif_stop(tp);
 
         tg3_full_lock(tp, 0);
 
@@ -9906,8 +9910,7 @@ static void tg3_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
         /* Update RX_MODE_KEEP_VLAN_TAG bit in RX_MODE register. */
         __tg3_set_rx_mode(dev);
 
-        if (netif_running(dev))
-                tg3_netif_start(tp);
+        tg3_netif_start(tp);
 
         tg3_full_unlock(tp);
 }