From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
[ Upstream commit 9c6850fea3edefef6e7153b2c466f09155399882 ]
Functions like phy_modify_paged() read the current page, on Realtek
PHY's this means reading the value of register 0x1f. Add special
handling for reading this register, similar to what we do already
in r8168g_mdio_write(). Currently we read a random value that by
chance seems to be 0 always.
Fixes: a2928d28643e ("r8169: use paged versions of phylib MDIO access functions")
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/realtek/r8169_main.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -863,6 +863,9 @@ static void r8168g_mdio_write(struct rtl
static int r8168g_mdio_read(struct rtl8169_private *tp, int reg)
{
+ if (reg == 0x1f)
+ return tp->ocp_base == OCP_STD_PHY_BASE ? 0 : tp->ocp_base >> 4;
+
if (tp->ocp_base != OCP_STD_PHY_BASE)
reg -= 0x10;
