net: hns3: disable phy loopback setting in hclge_mac_start_phy

stable inclusion
from stable-5.10.38
commit 65084886c6ee5f7f4e9cbe7afc79fb0243ab4099
bugzilla: 51875
CVE: NA

--------------------------------

[ Upstream commit 472497d0 ]

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: 256727da ("net: hns3: Add MDIO support to HNS3 Ethernet driver for hip08 SoC")
Signed-off-by: NYufeng Mo <moyufeng@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

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);
 }