phylib: move to dynamic allocation of struct mii_bus

This patch introduces mdiobus_alloc() and mdiobus_free(), and
makes all mdio bus drivers use these functions to allocate their
struct mii_bus'es dynamically.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Andy Fleming <afleming@freescale.com>
diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
index 27bd453..2ff9775 100644
--- a/drivers/net/phy/mdio-ofgpio.c
+++ b/drivers/net/phy/mdio-ofgpio.c
@@ -122,7 +122,7 @@
 
 	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
 	if (!new_bus)
-		goto out_free_priv;
+		goto out_free_bitbang;
 
 	new_bus->name = "GPIO Bitbanged MII",
 
@@ -155,9 +155,9 @@
 	dev_set_drvdata(&ofdev->dev, NULL);
 	kfree(new_bus->irq);
 out_free_bus:
-	kfree(new_bus);
-out_free_priv:
 	free_mdio_bitbang(new_bus);
+out_free_bitbang:
+	kfree(bitbang);
 out:
 	return ret;
 }
@@ -168,11 +168,10 @@
 	struct mdio_gpio_info *bitbang = bus->priv;
 
 	mdiobus_unregister(bus);
+	kfree(bus->irq);
 	free_mdio_bitbang(bus);
 	dev_set_drvdata(&ofdev->dev, NULL);
-	kfree(bus->irq);
 	kfree(bitbang);
-	kfree(bus);
 
 	return 0;
 }