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/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index ec82d59..51b0094 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -8555,7 +8555,7 @@
 
 	skb->protocol = eth_type_trans(skb, dev);
 	if (vlan_tag && sp->vlan_strip_flag)
-		__vlan_hwaccel_put_tag(skb, vlan_tag);
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
 	if (sp->config.napi)
 		netif_receive_skb(skb);
 	else