Merge branches 'pm-core', 'pm-qos', 'pm-domains' and 'pm-opp'

[linux.git] / drivers / net / phy / phy_device.c

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 92b08383cafa8b88e8d5b79ea3a5c0da9998770f..8c8e15b8739dec0ae96d72b514045a99eb1ed7e1 100644 (file)
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -908,6 +908,7 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
        struct module *ndev_owner = dev->dev.parent->driver->owner;
        struct mii_bus *bus = phydev->mdio.bus;
        struct device *d = &phydev->mdio.dev;
+       bool using_genphy = false;
        int err;
 
        /* For Ethernet device drivers that register their own MDIO bus, we
@@ -933,12 +934,22 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
                        d->driver =
                                &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver;
 
+               using_genphy = true;
+       }
+
+       if (!try_module_get(d->driver->owner)) {
+               dev_err(&dev->dev, "failed to get the device driver module\n");
+               err = -EIO;
+               goto error_put_device;
+       }
+
+       if (using_genphy) {
                err = d->driver->probe(d);
                if (err >= 0)
                        err = device_bind_driver(d);
 
                if (err)
-                       goto error;
+                       goto error_module_put;
        }
 
        if (phydev->attached_dev) {
@@ -975,7 +986,13 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
        return err;
 
 error:
+       /* phy_detach() does all of the cleanup below */
        phy_detach(phydev);
+       return err;
+
+error_module_put:
+       module_put(d->driver->owner);
+error_put_device:
        put_device(d);
        if (ndev_owner != bus->owner)
                module_put(bus->owner);
@@ -1039,6 +1056,8 @@ void phy_detach(struct phy_device *phydev)
 
        phy_led_triggers_unregister(phydev);
 
+       module_put(phydev->mdio.dev.driver->owner);
+
        /* If the device had no specific driver before (i.e. - it
         * was using the generic driver), we unbind the device
         * from the generic driver so that there's a chance a