[PATCH] net/mlx5: enhance error log for tunnel offloading

[David Marchand]

Tunnel offloading is linked to running a port with the non-obvious
dv_xmeta_en=3 devargs. Hint at it for "normal" users.

Fixes: 4ec6360de37d ("net/mlx5: implement tunnel offload")

Signed-off-by: David Marchand <david.marchand at redhat.com>
---
 drivers/net/mlx5/mlx5_flow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index d0275fdd00..51f6ecd25d 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -11295,7 +11295,7 @@ mlx5_flow_tunnel_validate(struct rte_eth_dev *dev,
 	if (!is_tunnel_offload_active(dev))
 		return rte_flow_error_set(error, ENOTSUP,
 					  RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
-					  "tunnel offload was not activated");
+					  "tunnel offload was not activated, consider setting dv_xmeta_en=3");
 	if (!tunnel)
 		return rte_flow_error_set(error, EINVAL,
 					  RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
-- 
2.40.0