of: mdio: Fall back to mdiobus_register() with NULL device_node

When the device_node specified is NULL, fall back to mdiobus_register().
We have a number of drivers having a similar pattern which is:

if (np)
	of_mdiobus_register()
else
	mdiobus_register()

so incorporate that behavior within the core of_mdiobus_register()
function. This is also consistent with the stub version that we defined
when CONFIG_OF=n.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 8c0c92712fc9ec4f4db2890987d663547b578b8e..d963baf8e53a22b53125a60b8c5c4dba1b1d5a33 100644 (file)
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -204,6 +204,9 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
        bool scanphys = false;
        int addr, rc;
 
+       if (!np)
+               return mdiobus_register(mdio);
+
        /* Do not continue if the node is disabled */
        if (!of_device_is_available(np))
                return -ENODEV;