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r8169: fix auto speed down issue 

It would cause no link after suspending or shutdowning when the
nic changes the speed to 10M and connects to a link partner which
forces the speed to 100M.

Check the link partner ability to determine which speed to set.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
hayeswang 2013-03-31 17:02:04 +00:00 committed by David S. Miller
parent 4f4ecd5f2a
commit e2409d8343
1 changed files with 25 additions and 3 deletions
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28
drivers/net/ethernet/realtek/r8169.c
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@ -3818,6 +3818,30 @@ static void rtl_init_mdio_ops(struct rtl8169_private *tp)
}
}
static void rtl_speed_down(struct rtl8169_private *tp)
{
u32 adv;
int lpa;
rtl_writephy(tp, 0x1f, 0x0000);
lpa = rtl_readphy(tp, MII_LPA);
if (lpa & (LPA_10HALF | LPA_10FULL))
adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
else if (lpa & (LPA_100HALF | LPA_100FULL))
adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
else
adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full |
(tp->mii.supports_gmii ?
ADVERTISED_1000baseT_Half |
ADVERTISED_1000baseT_Full : 0);
rtl8169_set_speed(tp->dev, AUTONEG_ENABLE, SPEED_1000, DUPLEX_FULL,
adv);
}
static void rtl_wol_suspend_quirk(struct rtl8169_private *tp)
{
void __iomem *ioaddr = tp->mmio_addr;
@ -3848,9 +3872,7 @@ static bool rtl_wol_pll_power_down(struct rtl8169_private *tp)
if (!(__rtl8169_get_wol(tp) & WAKE_ANY))
return false;
rtl_writephy(tp, 0x1f, 0x0000);
rtl_writephy(tp, MII_BMCR, 0x0000);
rtl_speed_down(tp);
rtl_wol_suspend_quirk(tp);
return true;