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net: phy: fix phy link up when limiting speed via device tree

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When limiting phy link speed using "max-speed" to 100mbps or less on a
giga bit phy, phy never completes auto negotiation and phy state
machine is held in PHY_AN. Fixing this issue by comparing the giga
bit advertise though phydev->supported doesn't have it but phy has
BMSR_ESTATEN set. So that auto negotiation is restarted as old and
new advertise are different and link comes up fine.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N 2015-06-25 22:21:02 +05:30 committed by David S. Miller
parent 4fdeddfe04
commit eb686231fc
1 changed files with 3 additions and 2 deletions
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5
drivers/net/phy/phy_device.c
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@ -796,10 +796,11 @@ static int genphy_config_advert(struct phy_device *phydev)
if (phydev->supported & (SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full)) {
adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
if (adv != oldadv)
changed = 1;
}
if (adv != oldadv)
changed = 1;
err = phy_write(phydev, MII_CTRL1000, adv);
if (err < 0)
return err;