[PATCH v2 2/2] net: emac: fix and unify emac_mdio functions

[Christian Lamparter]

emac_mdio_read_link() was not copying the requested phy settings
back into the emac driver's own phy api. This has caused a link
speed mismatch issue for the AR8035 as the emac driver kept
trying to connect with 10/100MBps on a 1GBit/s link.

This patch also unifies shared code between emac_setup_aneg()
and emac_mdio_setup_forced(). And furthermore it removes
a chunk of emac_mdio_init_phy(), that was copying the same
data into itself.

Signed-off-by: Christian Lamparter <chunk...@googlemail.com>
---
 drivers/net/ethernet/ibm/emac/core.c | 41 ++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/ibm/emac/core.c 
b/drivers/net/ethernet/ibm/emac/core.c
index b6e871bfb659..259e69a52ec5 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -2478,20 +2478,24 @@ static int emac_mii_bus_reset(struct mii_bus *bus)
        return emac_reset(dev);
 }
 
+static int emac_mdio_phy_start_aneg(struct mii_phy *phy,
+                                   struct phy_device *phy_dev)
+{
+       phy_dev->autoneg = phy->autoneg;
+       phy_dev->speed = phy->speed;
+       phy_dev->duplex = phy->duplex;
+       phy_dev->advertising = phy->advertising;
+       return phy_start_aneg(phy_dev);
+}
+
 static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise)
 {
        struct net_device *ndev = phy->dev;
        struct emac_instance *dev = netdev_priv(ndev);
 
-       dev->phy.autoneg = AUTONEG_ENABLE;
-       dev->phy.speed = SPEED_1000;
-       dev->phy.duplex = DUPLEX_FULL;
-       dev->phy.advertising = advertise;
        phy->autoneg = AUTONEG_ENABLE;
-       phy->speed = dev->phy.speed;
-       phy->duplex = dev->phy.duplex;
        phy->advertising = advertise;
-       return phy_start_aneg(dev->phy_dev);
+       return emac_mdio_phy_start_aneg(phy, dev->phy_dev);
 }
 
 static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd)
@@ -2499,13 +2503,10 @@ static int emac_mdio_setup_forced(struct mii_phy *phy, 
int speed, int fd)
        struct net_device *ndev = phy->dev;
        struct emac_instance *dev = netdev_priv(ndev);
 
-       dev->phy.autoneg =  AUTONEG_DISABLE;
-       dev->phy.speed = speed;
-       dev->phy.duplex = fd;
        phy->autoneg = AUTONEG_DISABLE;
        phy->speed = speed;
        phy->duplex = fd;
-       return phy_start_aneg(dev->phy_dev);
+       return emac_mdio_phy_start_aneg(phy, dev->phy_dev);
 }
 
 static int emac_mdio_poll_link(struct mii_phy *phy)
@@ -2527,16 +2528,17 @@ static int emac_mdio_read_link(struct mii_phy *phy)
 {
        struct net_device *ndev = phy->dev;
        struct emac_instance *dev = netdev_priv(ndev);
+       struct phy_device *phy_dev = dev->phy_dev;
        int res;
 
-       res = phy_read_status(dev->phy_dev);
+       res = phy_read_status(phy_dev);
        if (res)
                return res;
 
-       dev->phy.speed = phy->speed;
-       dev->phy.duplex = phy->duplex;
-       dev->phy.pause = phy->pause;
-       dev->phy.asym_pause = phy->asym_pause;
+       phy->speed = phy_dev->speed;
+       phy->duplex = phy_dev->duplex;
+       phy->pause = phy_dev->pause;
+       phy->asym_pause = phy_dev->asym_pause;
        return 0;
 }
 
@@ -2546,13 +2548,6 @@ static int emac_mdio_init_phy(struct mii_phy *phy)
        struct emac_instance *dev = netdev_priv(ndev);
 
        phy_start(dev->phy_dev);
-       dev->phy.autoneg = phy->autoneg;
-       dev->phy.speed = phy->speed;
-       dev->phy.duplex = phy->duplex;
-       dev->phy.advertising = phy->advertising;
-       dev->phy.pause = phy->pause;
-       dev->phy.asym_pause = phy->asym_pause;
-
        return phy_init_hw(dev->phy_dev);
 }
 
-- 
2.11.0