RDMA/mlx5: Handle link status event only for LAG device

The link status events of non-LAG devices are now handled in ib_core,
so only LAG device events need to be handled in driver.

Signed-off-by: Yuyu Li <liyuyu6@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: Yuyu Li

drivers/infiniband/hw/mlx5/main.c

@@ -242,6 +242,9 @@ static int mlx5_netdev_event(struct notifier_block *this,
 	case NETDEV_DOWN: {
 		struct net_device *upper = NULL;
 
+		if (!netif_is_lag_master(ndev) && !netif_is_lag_port(ndev))
+			return NOTIFY_DONE;
+
 		if (mlx5_lag_is_roce(mdev) || mlx5_lag_is_sriov(mdev)) {
 			struct net_device *lag_ndev;