net: hns3: Reset net device with rtnl_lock

BugLink: https://bugs.launchpad.net/bugs/1787477
Since current locking was not covering certain code where
netdev was being accessed or manipulated, this patch fixes
it.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 6d4fab39533f1bcd933d82d1667ceea93e4de260)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 98bfd13a562142613efa0ca3d49e71b07ddd2a61..187f6ebed6f89611cced52b9fc8cf8f0af52ff1a 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2840,15 +2840,13 @@ static void hclge_clear_reset_cause(struct hclge_dev *hdev)
 static void hclge_reset(struct hclge_dev *hdev)
 {
        /* perform reset of the stack & ae device for a client */
-
+       rtnl_lock();
        hclge_notify_client(hdev, HNAE3_DOWN_CLIENT);
 
        if (!hclge_reset_wait(hdev)) {
-               rtnl_lock();
                hclge_notify_client(hdev, HNAE3_UNINIT_CLIENT);
                hclge_reset_ae_dev(hdev->ae_dev);
                hclge_notify_client(hdev, HNAE3_INIT_CLIENT);
-               rtnl_unlock();
 
                hclge_clear_reset_cause(hdev);
        } else {
@@ -2858,6 +2856,7 @@ static void hclge_reset(struct hclge_dev *hdev)
        }
 
        hclge_notify_client(hdev, HNAE3_UP_CLIENT);
+       rtnl_unlock();
 }
 
 static void hclge_reset_event(struct hnae3_handle *handle)