net/mlx5e: Err if asked to offload TC match on frag being first

[ Upstream commit f85900c3e13fdb61f040c9feecbcda601e0cdcfb ]

The HW doesn't support matching on frag first/later, return error if we are
asked to offload that.

Fixes: 3f7d0eb42d59 ("net/mlx5e: Offload TC matching on packets being IP fragments")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 42bab73..5987555 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -780,6 +780,10 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
                                                  f->mask);
                addr_type = key->addr_type;
 
+               /* the HW doesn't support frag first/later */
+               if (mask->flags & FLOW_DIS_FIRST_FRAG)
+                       return -EOPNOTSUPP;
+
                if (mask->flags & FLOW_DIS_IS_FRAGMENT) {
                        MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
                        MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,