net: hns3: don't rollback when destroy mqprio fail

For destroy mqprio is irreversible in stack, so it's unnecessary
to rollback the tc configuration when destroy mqprio failed.
Otherwise, it may cause the configuration being inconsistent
between driver and netstack.

As the failure is usually caused by reset, and the driver will
restore the configuration after reset, so it can keep the
configuration being consistent between driver and hardware.

Fixes: 3fdd36666b6d ("net: hns3: add support for tc mqprio offload")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
index 96f96644abab935752a7f32879ed8defc6a9bdad..351b8f179a29cb3aba4955316eb53a76749e8a5b 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
@@ -514,12 +514,17 @@ static int hclge_setup_tc(struct hnae3_handle *h,
        return hclge_notify_init_up(hdev);
 
 err_out:
-       /* roll-back */
-       memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info));
-       if (hclge_config_tc(hdev, &kinfo->tc_info))
-               dev_err(&hdev->pdev->dev,
-                       "failed to roll back tc configuration\n");
-
+       if (!tc) {
+               dev_warn(&hdev->pdev->dev,
+                        "failed to destroy mqprio, will active after reset, ret = %d\n",
+                        ret);
+       } else {
+               /* roll-back */
+               memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info));
+               if (hclge_config_tc(hdev, &kinfo->tc_info))
+                       dev_err(&hdev->pdev->dev,
+                               "failed to roll back tc configuration\n");
+       }
        hclge_notify_init_up(hdev);
 
        return ret;