net/mlx5: support default RSS key as null

[dpdk.git] / drivers / net / mlx5 / mlx5_flow.c

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 107a4f0..be2cc6b 100644 (file)
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -912,7 +912,13 @@ mlx5_flow_validate_action_rss(const struct rte_flow_action *action,
                                          RTE_FLOW_ERROR_TYPE_ACTION_CONF,
                                          &rss->level,
                                          "tunnel RSS is not supported");
-       if (rss->key_len < MLX5_RSS_HASH_KEY_LEN)
+       /* allow RSS key_len 0 in case of NULL (default) RSS key. */
+       if (rss->key_len == 0 && rss->key != NULL)
+               return rte_flow_error_set(error, ENOTSUP,
+                                         RTE_FLOW_ERROR_TYPE_ACTION_CONF,
+                                         &rss->key_len,
+                                         "RSS hash key length 0");
+       if (rss->key_len > 0 && rss->key_len < MLX5_RSS_HASH_KEY_LEN)
                return rte_flow_error_set(error, ENOTSUP,
                                          RTE_FLOW_ERROR_TYPE_ACTION_CONF,
                                          &rss->key_len,