net: hns3: disable phy loopback setting in hclge_mac_start_phy

If selftest and reset are performed at the same time, the phy
loopback setting may be still in enable state after the reset,
and device cannot link up. So fix this issue by disabling phy
loopback before phy_start().

Fixes: 256727d ("net: hns3: Add MDIO support to HNS3 Ethernet driver for hip08 SoC")
Signed-off-by: Yufeng Mo <[email protected]>
Signed-off-by: Huazhong Tan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Yufeng Mo

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

@@ -255,6 +255,8 @@ void hclge_mac_start_phy(struct hclge_dev *hdev)
 	if (!phydev)
 		return;
 
+	phy_loopback(phydev, false);
+
 	phy_start(phydev);
 }