net: hns3: fix kernel crash when devlink reload during pf initialization

The devlink reload process will access the hardware resources,
but the register operation is done before the hardware is initialized.
So, processing the devlink reload during initialization may lead to kernel
crash. This patch fixes this by taking devl_lock during initialization.

Fixes: b741269b27 ("net: hns3: add support for registering devlink for PF")
Signed-off-by: Yonglong Liu <[email protected]>
Signed-off-by: Jijie Shao <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c

@@ -11626,6 +11626,8 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	if (ret)
 		goto err_pci_uninit;
 
+	devl_lock(hdev->devlink);
+
 	/* Firmware command queue initialize */
 	ret = hclge_comm_cmd_queue_init(hdev->pdev, &hdev->hw.hw);
 	if (ret)
@@ -11805,6 +11807,7 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 
 	hclge_task_schedule(hdev, round_jiffies_relative(HZ));
 
+	devl_unlock(hdev->devlink);
 	return 0;
 
 err_mdiobus_unreg:
@@ -11817,6 +11820,7 @@ err_msi_uninit:
 err_cmd_uninit:
 	hclge_comm_cmd_uninit(hdev->ae_dev, &hdev->hw.hw);
 err_devlink_uninit:
+	devl_unlock(hdev->devlink);
 	hclge_devlink_uninit(hdev);
 err_pci_uninit:
 	pcim_iounmap(pdev, hdev->hw.hw.io_base);