From b7bc3f6d282c653d47965535f4f1dddd7d859507 Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Mon, 11 Nov 2019 20:47:49 +0800 Subject: [PATCH] r8169: fix wrong PHY ID issue with RTL8168dp [ 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 Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yang Yingliang --- drivers/net/ethernet/realtek/r8169.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 0c8b7146637e..4ab87fe84542 100644 --- 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 rtl8169_private *tp, int reg) { 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); -- GitLab