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net: hns: Fix wrong read accesses via Clause 45 MDIO protocol

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[ Upstream commit cec8abba13e6a26729dfed41019720068eeeff2b ]

When reading phy registers via Clause 45 MDIO protocol, after write
address operation, the driver use another write address operation, so
can not read the right value of any phy registers. This patch fixes it.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yonglong Liu 2019-01-26 17:18:27 +08:00 • committed by Greg Kroah-Hartman
parent a270c6f52f
commit f398c84acf
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/hisilicon/hns_mdio.c
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@ -319,7 +319,7 @@ static int hns_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
}
hns_mdio_cmd_write(mdio_dev, is_c45,
MDIO_C45_WRITE_ADDR, phy_id, devad);
MDIO_C45_READ, phy_id, devad);
}
/* Step 5: waitting for MDIO_COMMAND_REG 's mdio_start==0,*/