net/mlx4_en: Call register_netdevice in the proper location

[ Upstream commit e5eda89d97ec256ba14e7e861387cc0468259c18 ]

Netdevice registration should be performed a the end of the driver
initialization flow. If we don't do that, after calling register_netdevice,
device callbacks may be issued by higher layers of the stack before
final configuration of the device is done.

For example (VXLAN configuration race), mlx4_SET_PORT_VXLAN was issued
after the register_netdev command. System network scripts may configure
the interface (UP) right after the registration, which also attach
unicast VXLAN steering rule, before mlx4_SET_PORT_VXLAN was called,
causing the firmware to fail the rule attachment.

Fixes: 837052d0ccc5 ("net/mlx4_en: Add netdev support for TCP/IP offloads of vxlan tunneling")
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 2f83f3489fdb3bac96b3f6556a5f926a0a176c57..8be0f3e1e8e9d12d238966b9df89b3c85bd39562 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -2497,13 +2497,6 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
        netif_carrier_off(dev);
        mlx4_en_set_default_moderation(priv);
 
-       err = register_netdev(dev);
-       if (err) {
-               en_err(priv, "Netdev registration failed for port %d\n", port);
-               goto out;
-       }
-       priv->registered = 1;
-
        en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
        en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
 
@@ -2543,6 +2536,14 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
                queue_delayed_work(mdev->workqueue, &priv->service_task,
                                   SERVICE_TASK_DELAY);
 
+       err = register_netdev(dev);
+       if (err) {
+               en_err(priv, "Netdev registration failed for port %d\n", port);
+               goto out;
+       }
+
+       priv->registered = 1;
+
        return 0;
 
 out: