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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Lin Yun Sheng <linyunsheng@huawei.com>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.9 094/293] net/hns:bugfix of ethtool -t phy
 self_test
Thread-Topic: [PATCH AUTOSEL for 4.9 094/293] net/hns:bugfix of ethtool -t phy
 self_test
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Date:   Mon, 9 Apr 2018 00:24:07 +0000
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From: Lin Yun Sheng <linyunsheng@huawei.com>

[ Upstream commit 7fe5b914313ff67d71cb2b5aa4b850e0884e75dd ]

This patch fixes the phy loopback self_test failed issue. when
Marvell Phy Module is loaded, it will powerdown fiber when doing
phy loopback self test, which cause phy loopback self_test fail.

Signed-off-by: Lin Yun Sheng <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net=
/ethernet/hisilicon/hns/hns_ethtool.c
index 86a496d71995..ea5f7bd14b80 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
@@ -288,9 +288,15 @@ static int hns_nic_config_phy_loopback(struct phy_devi=
ce *phy_dev, u8 en)
=20
 		/* Force 1000M Link, Default is 0x0200 */
 		phy_write(phy_dev, 7, 0x20C);
-		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
=20
-		/* Enable PHY loop-back */
+		/* Powerup Fiber */
+		phy_write(phy_dev, HNS_PHY_PAGE_REG, 1);
+		val =3D phy_read(phy_dev, COPPER_CONTROL_REG);
+		val &=3D ~PHY_POWER_DOWN;
+		phy_write(phy_dev, COPPER_CONTROL_REG, val);
+
+		/* Enable Phy Loopback */
+		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
 		val =3D phy_read(phy_dev, COPPER_CONTROL_REG);
 		val |=3D PHY_LOOP_BACK;
 		val &=3D ~PHY_POWER_DOWN;
@@ -299,6 +305,12 @@ static int hns_nic_config_phy_loopback(struct phy_devi=
ce *phy_dev, u8 en)
 		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0xFA);
 		phy_write(phy_dev, 1, 0x400);
 		phy_write(phy_dev, 7, 0x200);
+
+		phy_write(phy_dev, HNS_PHY_PAGE_REG, 1);
+		val =3D phy_read(phy_dev, COPPER_CONTROL_REG);
+		val |=3D PHY_POWER_DOWN;
+		phy_write(phy_dev, COPPER_CONTROL_REG, val);
+
 		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
 		phy_write(phy_dev, 9, 0xF00);
=20
--=20
2.15.1