From: Eric Dumazet <edumazet@google.com>
Date: Tue, 27 Mar 2018 14:21:14 -0700
Subject: net/mlx4_en: CHECKSUM_COMPLETE support for fragments
Patch-mainline: v4.17-rc1
Git-commit: ce5a453c4421ccd68a98fd987b6878923c549be2
References: bsc#1103989 FATE#326004
Refine the RX check summing handling to propagate the
hardware provided checksum so that we do not have to
compute it later in software.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -821,14 +821,12 @@ xdp_drop_no_cnt:
skb_record_rx_queue(skb, cq_ring);
if (likely(dev->features & NETIF_F_RXCSUM)) {
- if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_TCP |
- MLX4_CQE_STATUS_UDP)) {
+ if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_TCP |
+ MLX4_CQE_STATUS_UDP)) &&
+ (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
+ cqe->checksum == cpu_to_be16(0xffff)) {
bool l2_tunnel;
- if (!((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
- cqe->checksum == cpu_to_be16(0xffff)))
- goto csum_none;
-
l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
(cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
ip_summed = CHECKSUM_UNNECESSARY;