For carrier detection to work properly when binding the driver with a cable unplugged, netif_carrier_off() should be called after register_netdev(), not before.
Calling netif_carrier_off() before register_netdev() was causing the network interface to miss a linkwatch pending event leading to an inconsistent state if the link is not up when interface is initialized. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Ilya Shchepetkov <[email protected]> --- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index edd9cb8..7bf2923 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1676,13 +1676,13 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, mdev->pndev[port] = dev; - netif_carrier_off(dev); err = register_netdev(dev); if (err) { en_err(priv, "Netdev registration failed for port %d\n", port); goto out; } priv->registered = 1; + netif_carrier_off(dev); en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num); en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num); -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
