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r8169: fix autoneg issue on resume with RTL8168E

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It was reported that chip version 33 (RTL8168E) ends up with
10MBit/Half on a 1GBit link after resuming from S3 (with different
link partners). For whatever reason the PHY on this chip doesn't
properly start a renegotiation when soft-reset.
Explicitly requesting a renegotiation fixes this.

Fixes: a2965f12fd ("r8169: remove rtl8169_set_speed_xmii")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reported-by: Neil MacLeod <neil@nmacleod.com>
Tested-by: Neil MacLeod <neil@nmacleod.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2018-09-20 22:47:09 +02:00 committed by David S. Miller
parent d7ab5cdce5
commit 10bc6a6042
1 changed files with 9 additions and 0 deletions
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9
drivers/net/ethernet/realtek/r8169.c
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@ -4071,6 +4071,15 @@ static void rtl8169_init_phy(struct net_device *dev, struct rtl8169_private *tp)
phy_speed_up(dev->phydev);
genphy_soft_reset(dev->phydev);
/* It was reported that chip version 33 ends up with 10MBit/Half on a
* 1GBit link after resuming from S3. For whatever reason the PHY on
* this chip doesn't properly start a renegotiation when soft-reset.
* Explicitly requesting a renegotiation fixes this.
*/
if (tp->mac_version == RTL_GIGA_MAC_VER_33 &&
dev->phydev->autoneg == AUTONEG_ENABLE)
phy_restart_aneg(dev->phydev);
}
static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)