net: vlan: add protocol argument to packet tagging functions

Add a protocol argument to the VLAN packet tagging functions. In case of HW
tagging, we need that protocol available in the ndo_start_xmit functions,
so it is stored in a new field in the skb. The new field fits into a hole
(on 64 bit) and doesn't increase the sks's size.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c
index cdbc544..8b04bfc 100644
--- a/drivers/net/ethernet/adaptec/starfire.c
+++ b/drivers/net/ethernet/adaptec/starfire.c
@@ -1498,7 +1498,7 @@
 				printk(KERN_DEBUG "  netdev_rx() vlanid = %d\n",
 				       vlid);
 			}
-			__vlan_hwaccel_put_tag(skb, vlid);
+			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlid);
 		}
 #endif /* VLAN_SUPPORT */
 		netif_receive_skb(skb);