mlx4: TCP/UDP packets have L4 hash

Mellanox driver has the knowledge if rxhash is a L4 hash,
if it receives a non fragmented TCP or UDP frame and
NETIF_F_RXCSUM is enabled on netdev.

ip_summed value is CHECKSUM_UNNECESSARY in this case.

Signed-off-by: Eric Dumazet <[email protected]>
Cc: Amir Vadai <[email protected]>
Cc: Ido Shamay <[email protected]>
Acked-by: Ido Shamay <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 7a4f20bb7fcb4c2640ad8111f5a98ff95088075c..12c65e1ad6a93c54d94c8add0adbc9685f9ef417 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -917,7 +917,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                        if (dev->features & NETIF_F_RXHASH)
                                skb_set_hash(gro_skb,
                                             be32_to_cpu(cqe->immed_rss_invalid),
-                                            PKT_HASH_TYPE_L3);
+                                            (ip_summed == CHECKSUM_UNNECESSARY) ?
+                                               PKT_HASH_TYPE_L4 :
+                                               PKT_HASH_TYPE_L3);
 
                        skb_record_rx_queue(gro_skb, cq->ring);
                        skb_mark_napi_id(gro_skb, &cq->napi);
@@ -963,7 +965,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                if (dev->features & NETIF_F_RXHASH)
                        skb_set_hash(skb,
                                     be32_to_cpu(cqe->immed_rss_invalid),
-                                    PKT_HASH_TYPE_L3);
+                                    (ip_summed == CHECKSUM_UNNECESSARY) ?
+                                       PKT_HASH_TYPE_L4 :
+                                       PKT_HASH_TYPE_L3);
 
                if ((be32_to_cpu(cqe->vlan_my_qpn) &
                    MLX4_CQE_VLAN_PRESENT_MASK) &&