net/mlx5e: MACsec, block offload requests with encrypt off

Currently offloading MACsec with authentication only (encrypt
property set to off) is not supported, block such requests
when adding/updating a macsec device.

Fixes: 8ff0ac5be144 ("net/mlx5: Add MACsec offload Tx command support")
Signed-off-by: Emeel Hakim <ehakim@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index 137b343..0d6dc39 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -458,6 +458,11 @@ static bool mlx5e_macsec_secy_features_validate(struct macsec_context *ctx)
                return false;
        }
 
+       if (!ctx->secy->tx_sc.encrypt) {
+               netdev_err(netdev, "MACsec offload: encrypt off isn't supported\n");
+               return false;
+       }
+
        return true;
 }