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r8169: fix wrong PHY ID issue with RTL8168dp
[ Upstream commit62bdc8fd1c
] As reported in [0] at least one RTL8168dp version has problems establishing a link. This chip version has an integrated RTL8211b PHY, however the chip seems to report a wrong PHY ID, resulting in a wrong PHY driver (for Generic Realtek PHY) being loaded. Work around this issue by adding a hook to r8168dp_2_mdio_read() for returning the correct PHY ID. [0] https://bbs.archlinux.org/viewtopic.php?id=246508 Fixes:242cd9b586
("r8169: use phy_resume/phy_suspend") Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1010,6 +1010,10 @@ static int r8168dp_2_mdio_read(struct rtl8169_private *tp, int reg)
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{
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int value;
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/* Work around issue with chip reporting wrong PHY ID */
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if (reg == MII_PHYSID2)
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return 0xc912;
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r8168dp_2_mdio_start(tp);
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value = r8169_mdio_read(tp, reg);
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