net/mlx5e: Optimization for MTU change

[cascardo/linux.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_main.c

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 870bea3..65258b2 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1826,10 +1826,6 @@ int mlx5e_open_locked(struct net_device *netdev)
        netif_set_real_num_tx_queues(netdev, num_txqs);
        netif_set_real_num_rx_queues(netdev, priv->params.num_channels);
 
-       err = mlx5e_set_dev_port_mtu(netdev);
-       if (err)
-               goto err_clear_state_opened_flag;
-
        err = mlx5e_open_channels(priv);
        if (err) {
                netdev_err(netdev, "%s: mlx5e_open_channels failed, %d\n",
@@ -2573,6 +2569,7 @@ static int mlx5e_change_mtu(struct net_device *netdev, int new_mtu)
        u16 max_mtu;
        u16 min_mtu;
        int err = 0;
+       bool reset;
 
        mlx5_query_port_max_mtu(mdev, &max_mtu, 1);
 
@@ -2588,13 +2585,18 @@ static int mlx5e_change_mtu(struct net_device *netdev, int new_mtu)
 
        mutex_lock(&priv->state_lock);
 
+       reset = !priv->params.lro_en &&
+               (priv->params.rq_wq_type !=
+                MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ);
+
        was_opened = test_bit(MLX5E_STATE_OPENED, &priv->state);
-       if (was_opened)
+       if (was_opened && reset)
                mlx5e_close_locked(netdev);
 
        netdev->mtu = new_mtu;
+       mlx5e_set_dev_port_mtu(netdev);
 
-       if (was_opened)
+       if (was_opened && reset)
                err = mlx5e_open_locked(netdev);
 
        mutex_unlock(&priv->state_lock);
@@ -3463,6 +3465,8 @@ void *mlx5e_create_netdev(struct mlx5_core_dev *mdev,
 
        mlx5e_init_l2_addr(priv);
 
+       mlx5e_set_dev_port_mtu(netdev);
+
        err = register_netdev(netdev);
        if (err) {
                mlx5_core_err(mdev, "register_netdev failed, %d\n", err);