amd-xgbe-phy: Sync PCS and PHY modes after reset

This patch adds support to sync the states of the PCS and the PHY
after a reset is performed.  If the PCS and the PHY are not in the
same state after reset an extra mode change would be performed. This
extra mode change might not be needed if the PCS and the PHY are
synced up after reset.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/amd-xgbe-phy.c b/drivers/net/phy/amd-xgbe-phy.c
index c456559f6e7f2ea3ae713e98c93e58148aaa7776..37b9f3fff1ce3d27c8d6d4511bad5dfdbd7e9398 100644 (file)
--- a/drivers/net/phy/amd-xgbe-phy.c
+++ b/drivers/net/phy/amd-xgbe-phy.c
@@ -992,7 +992,8 @@ static int amd_xgbe_phy_soft_reset(struct phy_device *phydev)
        if (ret & MDIO_CTRL1_RESET)
                return -ETIMEDOUT;
 
-       return 0;
+       /* Make sure the XPCS and SerDes are in compatible states */
+       return amd_xgbe_phy_xgmii_mode(phydev);
 }
 
 static int amd_xgbe_phy_config_init(struct phy_device *phydev)