net: hns3: bugfix for rtnl_lock's range in the hclgevf_reset()

[ Upstream commit 29118ab962d5476fdc65fae312ac38db68092d78 ]

Since hclgevf_reset_wait() is used to wait for the hardware to complete
the reset, it is not necessary to hold the rtnl_lock during
hclgevf_reset_wait(). So this patch releases the lock for the duration
of hclgevf_reset_wait().

Fixes: 6988eb2a9b77 ("net: hns3: Add support to reset the enet/ring mgmt layer")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 320043e..5570fb5 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -1065,6 +1065,8 @@ static int hclgevf_reset(struct hclgevf_dev *hdev)
        /* bring down the nic to stop any ongoing TX/RX */
        hclgevf_notify_client(hdev, HNAE3_DOWN_CLIENT);
 
+       rtnl_unlock();
+
        /* check if VF could successfully fetch the hardware reset completion
         * status from the hardware
         */
@@ -1076,12 +1078,15 @@ static int hclgevf_reset(struct hclgevf_dev *hdev)
                        ret);
 
                dev_warn(&hdev->pdev->dev, "VF reset failed, disabling VF!\n");
+               rtnl_lock();
                hclgevf_notify_client(hdev, HNAE3_UNINIT_CLIENT);
 
                rtnl_unlock();
                return ret;
        }
 
+       rtnl_lock();
+
        /* now, re-initialize the nic client and ae device*/
        ret = hclgevf_reset_stack(hdev);
        if (ret)