linux-kernel - [PATCH 5.4 071/141] net: hns3: disable phy loopback setting in hclge_mac_start

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Message-Id: <20210517140245.173251046@linuxfoundation.org>
Date:   Mon, 17 May 2021 16:02:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yufeng Mo <moyufeng@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 071/141] net: hns3: disable phy loopback setting in hclge_mac_start_phy

From: Yufeng Mo <moyufeng@...wei.com>

[ Upstream commit 472497d0bdae890a896013332a0b673f9acdf2bf ]

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: 256727da7395 ("net: hns3: Add MDIO support to HNS3 Ethernet driver for hip08 SoC")
Signed-off-by: Yufeng Mo <moyufeng@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c
index dc4dfd4602ab..c8f979c55fec 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c
+++ b/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);
 }
 
-- 
2.30.2