net/mlx5e: Avoid implicit modify hdr for decap drop rule

Currently the driver adds implicit modify hdr action for
decap rules on tunnel devices if the port is an ovs port.
This is also done if the action is drop and makes the modify
hdr redundant and also the FW doesn't support it and will generate
a syndrome.

kernel: mlx5_core 0000:08:00.0: mlx5_cmd_check:777:(pid 102063): SET_FLOW_TABLE_ENTRY(0x936) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x8708c3)

Fix it by adding the implicit modify hdr only for fwd actions.

Fixes: e94cae3b4c31 ("net/mlx5: Support internal port as decap route device")
Fixes: 84b1abd99484 ("net/mlx5e: TC, Fix memory leak with rules with internal port")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Ariel Levkovich <lariel@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 4c6e3c26c1abb76ea9521985804a47131e0667aa..2022fa4a959850e929329b9c6c4255373339bc2c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1414,7 +1414,8 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
                if (err)
                        goto err_out;
 
-               if (!attr->chain && esw_attr->int_port) {
+               if (!attr->chain && esw_attr->int_port &&
+                   attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
                        /* If decap route device is internal port, change the
                         * source vport value in reg_c0 back to uplink just in
                         * case the rule performs goto chain > 0. If we have a miss