| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 62/79] r8169: fix wrong PHY ID issue with RTL8168dp | Date | Fri, 8 Nov 2019 19:50:42 +0100 |
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From: Heiner Kallweit <hkallweit1@gmail.com>
[ Upstream commit 62bdc8fd1c21d4263ebd18bec57f82532d09249f ]
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: 242cd9b5866a ("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> --- drivers/net/ethernet/realtek/r8169.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -1010,6 +1010,10 @@ static int r8168dp_2_mdio_read(struct rt { int value; + /* Work around issue with chip reporting wrong PHY ID */ + if (reg == MII_PHYSID2) + return 0xc912; + r8168dp_2_mdio_start(tp); value = r8169_mdio_read(tp, reg);
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