net/mlx5e: Fix traffic between VF and representor

After the cited commit, WQE RQ size is calculated based on sw_mtu but it
was not set for representors. This commit fixes that.

Fixes: 472a1e44 ("net/mlx5e: Save MTU in channels params")
Signed-off-by: Shahar Klein <shahark@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en_rep.c

@@ -877,13 +877,14 @@ static const struct net_device_ops mlx5e_netdev_ops_rep = {
 };
 
 static void mlx5e_build_rep_params(struct mlx5_core_dev *mdev,
-				   struct mlx5e_params *params)
+				   struct mlx5e_params *params, u16 mtu)
 {
 	u8 cq_period_mode = MLX5_CAP_GEN(mdev, cq_period_start_from_cqe) ?
 					 MLX5_CQ_PERIOD_MODE_START_FROM_CQE :
 					 MLX5_CQ_PERIOD_MODE_START_FROM_EQE;
 
 	params->hard_mtu    = MLX5E_ETH_HARD_MTU;
+	params->sw_mtu      = mtu;
 	params->log_sq_size = MLX5E_REP_PARAMS_LOG_SQ_SIZE;
 	params->rq_wq_type  = MLX5_WQ_TYPE_LINKED_LIST;
 	params->log_rq_mtu_frames = MLX5E_REP_PARAMS_LOG_RQ_SIZE;
@@ -931,7 +932,7 @@ static void mlx5e_init_rep(struct mlx5_core_dev *mdev,
 
 	priv->channels.params.num_channels = profile->max_nch(mdev);
 
-	mlx5e_build_rep_params(mdev, &priv->channels.params);
+	mlx5e_build_rep_params(mdev, &priv->channels.params, netdev->mtu);
 	mlx5e_build_rep_netdev(netdev);
 
 	mlx5e_timestamp_init(priv);