[PATCH] net/mlx5: fix external egress group translation

[Maayan Kashani <mkashani@nvidia.com>]

Representor matching is always enabled on an E-Switch port, and the PMD
reserves egress group 0 for the default SQ tagging rule. Removing
repr_matching_en left the user group shift enabled only for extended
metadata mode. With any other dv_xmeta_en value, an external egress
group 0 rule is installed on the root table, where a jump to a non-root
group matches but does not continue.

Shift every external egress group when the E-Switch is enabled.
This restores the previous repr_matching_en=1 behavior.

Fixes: c41f621786ff ("net/mlx5: remove representor matching devarg")
Cc: stable@dpdk.org

Signed-off-by: Maayan Kashani <mkashani@nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_hw.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_hw.c b/drivers/net/mlx5/mlx5_flow_hw.c
index 8dabf21b768..4b30befa2d1 100644
--- a/drivers/net/mlx5/mlx5_flow_hw.c
+++ b/drivers/net/mlx5/mlx5_flow_hw.c
@@ -5591,7 +5591,6 @@ __translate_group(struct rte_eth_dev *dev,
 						  "group index not supported");
 		*table_group = group + 1;
 	} else if (config->dv_esw_en &&
-		   config->dv_xmeta_en == MLX5_XMETA_MODE_META32_HWS &&
 		   external &&
 		   flow_attr->egress) {
 		/*
@@ -5600,9 +5599,8 @@ __translate_group(struct rte_eth_dev *dev,
 		 * These flow rules are inserted in group 0 and this group is reserved by PMD
 		 * for these purposes.
 		 *
-		 * As a result, if representor matching or extended metadata mode is enabled,
-		 * group provided by the user must be incremented to avoid inserting flow rules
-		 * in group 0.
+		 * Representor matching is always enabled, so the group provided by the user
+		 * must be incremented to avoid inserting flow rules in group 0.
 		 */
 		if (group > MLX5_HW_MAX_EGRESS_GROUP)
 			return rte_flow_error_set(error, EINVAL,
-- 
2.25.1