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    Subject[PATCH 4.14 11/45] net/mlx5e: Err if asked to offload TC match on frag being first
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

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

    From: Roi Dayan <roid@mellanox.com>

    [ 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>
    ---
    drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- 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 mlx
    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,

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