net/mlx5: remove GRE inner IPv6 matching limitation

Such limitation seems not to exist on:
 - MLNX_OFED_linux-4.5-0.3.0.0 (Beta)
 - MLNX_OFED_LINUX-4.4-2.0.7.0 (GA)
 - upstream kernel 4.19.0-rc7

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 21d65f4..5ad3a11 100644 (file)
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -1240,17 +1240,6 @@ mlx5_flow_validate_item_ipv6(const struct rte_flow_item *item,
                return rte_flow_error_set(error, EINVAL,
                                          RTE_FLOW_ERROR_TYPE_ITEM, item,
                                          "L3 cannot follow an L4 layer.");
-       /*
-        * IPv6 is not recognised by the NIC inside a GRE tunnel.
-        * Such support has to be disabled as the rule will be
-        * accepted.  Issue reproduced with Mellanox OFED 4.3-3.0.2.1 and
-        * Mellanox OFED 4.4-1.0.0.0.
-        */
-       if (tunnel && item_flags & MLX5_FLOW_LAYER_GRE)
-               return rte_flow_error_set(error, ENOTSUP,
-                                         RTE_FLOW_ERROR_TYPE_ITEM, item,
-                                         "IPv6 inside a GRE tunnel is"
-                                         " not recognised.");
        if (!mask)
                mask = &rte_flow_item_ipv6_mask;
        ret = mlx5_flow_item_acceptable(item, (const uint8_t *)mask,