net/mlx5: Add pci shutdown callback
This patch introduces kexec support for mlx5.
When switching kernels, kexec() calls shutdown, which unloads
the driver and cleans its resources.
In addition, remove unregister netdev from shutdown flow. This will
allow a clean shutdown, even if some netdev clients did not release their
reference from this netdev. Releasing The HW resources only is enough as
the kernel is shutting down
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Haggai Abramovsky <hagaya@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 85773f8..67d548b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2633,7 +2633,16 @@
schedule_work(&priv->set_rx_mode_work);
mlx5e_disable_async_events(priv);
flush_scheduled_work();
- unregister_netdev(netdev);
+ if (test_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &mdev->intf_state)) {
+ netif_device_detach(netdev);
+ mutex_lock(&priv->state_lock);
+ if (test_bit(MLX5E_STATE_OPENED, &priv->state))
+ mlx5e_close_locked(netdev);
+ mutex_unlock(&priv->state_lock);
+ } else {
+ unregister_netdev(netdev);
+ }
+
mlx5e_tc_cleanup(priv);
mlx5e_vxlan_cleanup(priv);
mlx5e_destroy_flow_tables(priv);
@@ -2646,7 +2655,9 @@
mlx5_core_dealloc_transport_domain(priv->mdev, priv->tdn);
mlx5_core_dealloc_pd(priv->mdev, priv->pdn);
mlx5_unmap_free_uar(priv->mdev, &priv->cq_uar);
- free_netdev(netdev);
+
+ if (!test_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &mdev->intf_state))
+ free_netdev(netdev);
}
static void *mlx5e_get_netdev(void *vpriv)