tg3: Allow for recieve of full-size 8021AD frames

When receiving a vlan-tagged frame that still contains a vlan header, the length of the packet will be greater then MTU+ETH_HLEN since it will account of the extra vlan header. TG3 checks this for the case for 802.1Q, but not for 802.1ad. As a result, full sized 802.1ad frames get dropped by the card. Add a check for 802.1ad protocol when receving full sized frames. Suggested-by: Prashant Sreedharan <[email protected]> CC: Prashant Sreedharan <[email protected]> CC: Michael Chan <[email protected]> Signed-off-by: Vladislav Yasevich <[email protected]> Signed-off-by: David S. Miller <[email protected]>
dtwlin · Oct 1, 2014 · 7d3083e · 7d3083e
1 parent f561de3
commit 7d3083e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
@@ -6918,7 +6918,8 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
 		skb->protocol = eth_type_trans(skb, tp->dev);
 
 		if (len > (tp->dev->mtu + ETH_HLEN) &&
-		    skb->protocol != htons(ETH_P_8021Q)) {
+		    skb->protocol != htons(ETH_P_8021Q) &&
+		    skb->protocol != htons(ETH_P_8021AD)) {
 			dev_kfree_skb_any(skb);
 			goto drop_it_no_recycle;
 		}