net/mlx5e: IPsec/rep_tc: Fix rep_tc_update_skb drops IPsec packet

rep_tc copy REG_C1 to REG_B. IPsec crypto utilizes the whole REG_B
register with BIT31 as IPsec marker. rep_tc_update_skb drops
IPsec because it thought REG_B contains bad value.

In previous patch, BIT 31 of REG_C1 is reserved for IPsec.
Skip the rep_tc_update_skb if BIT31 of REG_B is set.

Signed-off-by: Huy Nguyen <huyn@nvidia.com>
Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index f90894e..5346271 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -1310,7 +1310,8 @@ static void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
        if (rep->vlan && skb_vlan_tag_present(skb))
                skb_vlan_pop(skb);
 
-       if (!mlx5e_rep_tc_update_skb(cqe, skb, &tc_priv)) {
+       if (unlikely(!mlx5_ipsec_is_rx_flow(cqe) &&
+                    !mlx5e_rep_tc_update_skb(cqe, skb, &tc_priv))) {
                dev_kfree_skb_any(skb);
                goto free_wqe;
        }
@@ -1367,7 +1368,8 @@ static void mlx5e_handle_rx_cqe_mpwrq_rep(struct mlx5e_rq *rq, struct mlx5_cqe64
 
        mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
 
-       if (!mlx5e_rep_tc_update_skb(cqe, skb, &tc_priv)) {
+       if (unlikely(!mlx5_ipsec_is_rx_flow(cqe) &&
+                    !mlx5e_rep_tc_update_skb(cqe, skb, &tc_priv))) {
                dev_kfree_skb_any(skb);
                goto mpwrq_cqe_out;
        }