mlx4: Set skb->csum_level for encapsulated checksum

Set skb->csum_level instead of skb->encapsulation when indicating
CHECKSUM_UNNECESSARY for an encapsulated checksum.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 9c909d2..b7da466 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -769,7 +769,7 @@
 					gro_skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 					if (l2_tunnel)
-						gro_skb->encapsulation = 1;
+						gro_skb->csum_level = 1;
 					if ((cqe->vlan_my_qpn &
 					    cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK)) &&
 					    (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) {
@@ -823,8 +823,8 @@
 		skb->protocol = eth_type_trans(skb, dev);
 		skb_record_rx_queue(skb, cq->ring);
 
-		if (l2_tunnel)
-			skb->encapsulation = 1;
+		if (l2_tunnel && ip_summed == CHECKSUM_UNNECESSARY)
+			skb->csum_level = 1;
 
 		if (dev->features & NETIF_F_RXHASH)
 			skb_set_hash(skb,