4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maor Gottlieb <[email protected]>

[ Upstream commit a93b632c4531ff50c43d658447a45cbc11f488fd ]

Currently the driver sets the mask of the gre_protocol to 0xffff
without consideration in the user request.

Fix it by copy the mask from the verbs spec.

Fixes: da2f22ae7707 ("IB/mlx5: Add support for GRE flow specification")
Signed-off-by: Maor Gottlieb <[email protected]>
Reviewed-by: Ariel Levkovich <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 drivers/infiniband/hw/mlx5/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -2699,7 +2699,7 @@ static int parse_flow_attr(struct mlx5_c
                         IPPROTO_GRE);
 
                MLX5_SET(fte_match_set_misc, misc_params_c, gre_protocol,
-                        0xffff);
+                        ntohs(ib_spec->gre.mask.protocol));
                MLX5_SET(fte_match_set_misc, misc_params_v, gre_protocol,
                         ntohs(ib_spec->gre.val.protocol));
 


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