net/mlx5: Lag, move lag destruction to a workqueue

If a netdev is removed from the lag the lag should be destroyed.
With downstream patches this might trigger a reconfiguration of
representors on a different eswitch and such we don't have the proper
locking to so from this path. Move the destruction to be done by the
workqueue.

As the destruction won't affect the netdev side it okay to do so.
The RDMA side will be reconfigured and it already coded to handle such
reconfiguration.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
index 459e3e5ef13f6a5d5430b29f4fd8685fdb88e8f2..89cd2b2af50a2ce8a66ecae31b863a1d3b98b2da 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
@@ -371,12 +371,13 @@ static void mlx5_do_bond(struct mlx5_lag *ldev)
        bool do_bond, roce_lag;
        int err;
 
-       if (!mlx5_lag_is_ready(ldev))
-               return;
-
-       tracker = ldev->tracker;
+       if (!mlx5_lag_is_ready(ldev)) {
+               do_bond = false;
+       } else {
+               tracker = ldev->tracker;
 
-       do_bond = tracker.is_bonded && mlx5_lag_check_prereq(ldev);
+               do_bond = tracker.is_bonded && mlx5_lag_check_prereq(ldev);
+       }
 
        if (do_bond && !__mlx5_lag_is_active(ldev)) {
                roce_lag = !mlx5_sriov_is_enabled(dev0) &&
@@ -733,11 +734,11 @@ void mlx5_lag_remove_netdev(struct mlx5_core_dev *dev,
        if (!ldev)
                return;
 
-       if (__mlx5_lag_is_active(ldev))
-               mlx5_disable_lag(ldev);
-
        mlx5_ldev_remove_netdev(ldev, netdev);
        ldev->flags &= ~MLX5_LAG_FLAG_READY;
+
+       if (__mlx5_lag_is_active(ldev))
+               mlx5_queue_bond_work(ldev, 0);
 }
 
 /* Must be called with intf_mutex held */