Commit eb686231 authored Jun 25, 2015 by Mugunthan V N Committed by David S. Miller Jun 28, 2015

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



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>

parent 4fdeddfe

drivers/net/phy/phy_device.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -796,9 +796,10 @@ 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;
		}

		err = phy_write(phydev, MII_CTRL1000, adv);
		if (err < 0)