phylib: Properly reinitialize PHYs after hibernation

Since hibernation assumes power loss, we should fully reinitialize
PHYs (including platform fixups), as if PHYs were just attached.

This patch factors phy_init_hw() out of phy_attach_direct(), then
converts mdio_bus to dev_pm_ops and adds an appropriate restore()
callback.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 15 deletions

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index b10fedd82143..8212b2b93422 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -378,6 +378,20 @@ void phy_disconnect(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_disconnect);
 
+int phy_init_hw(struct phy_device *phydev)
+{
+        int ret;
+
+        if (!phydev->drv || !phydev->drv->config_init)
+                return 0;
+
+        ret = phy_scan_fixups(phydev);
+        if (ret < 0)
+                return ret;
+
+        return phydev->drv->config_init(phydev);
+}
+
 /**
  * phy_attach_direct - attach a network device to a given PHY device pointer
  * @dev: network device to attach
@@ -425,21 +439,7 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
         /* Do initial configuration here, now that
          * we have certain key parameters
          * (dev_flags and interface) */
-        if (phydev->drv->config_init) {
-                int err;
-
-                err = phy_scan_fixups(phydev);
-
-                if (err < 0)
-                        return err;
-
-                err = phydev->drv->config_init(phydev);
-
-                if (err < 0)
-                        return err;
-        }
-
-        return 0;
+        return phy_init_hw(phydev);
 }
 EXPORT_SYMBOL(phy_attach_direct);