[dpdk-stable] [PATCH] net/mlx5: prohibit wildcard match for GRE protocol

[Yongseok Koh]

Currently, driver sets full mask (0xffff) for GRE protocol to device. Until
it is changed, PMD can't support wildcard match.

Fixes: f4b901a46aec ("net/mlx5: add flow GRE item")
Cc: stable at dpdk.org

Signed-off-by: Yongseok Koh <yskoh at mellanox.com>
---
 drivers/net/mlx5/mlx5_flow.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index b7500ec9d6..83ac6cbb85 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -1690,8 +1690,12 @@ mlx5_flow_item_gre(const struct rte_flow_item *item,
 					  RTE_FLOW_ERROR_TYPE_ITEM,
 					  item,
 					  "L3 Layer is missing");
-	if (!mask)
-		mask = &rte_flow_item_gre_mask;
+	if (!mask || mask->protocol != 0xffff)
+		return rte_flow_error_set(error, ENOTSUP,
+					  RTE_FLOW_ERROR_TYPE_ITEM,
+					  item,
+					  "wildcard match is not supported"
+					  " for protocol field of GRE");
 	ret = mlx5_flow_item_acceptable
 		(item, (const uint8_t *)mask,
 		 (const uint8_t *)&rte_flow_item_gre_mask,
-- 
2.11.0