Only 1 of the 3 drivers currently has a set_addr() operation. Make the
set_addr() callback optional to reduce the amount of empty stubs inside
the drivers.
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
        if (ret < 0)
                goto out;
 
-       ret = ops->set_addr(ds, dst->master_netdev->dev_addr);
-       if (ret < 0)
-               goto out;
+       if (ops->set_addr) {
+               ret = ops->set_addr(ds, dst->master_netdev->dev_addr);
+               if (ret < 0)
+                       goto out;
+       }
 
        if (!ds->slave_mii_bus && ops->phy_read) {
                ds->slave_mii_bus = devm_mdiobus_alloc(parent);
 
        if (err < 0)
                return err;
 
-       err = ds->ops->set_addr(ds, dst->master_netdev->dev_addr);
-       if (err < 0)
-               return err;
+       if (ds->ops->set_addr) {
+               err = ds->ops->set_addr(ds, dst->master_netdev->dev_addr);
+               if (err < 0)
+                       return err;
+       }
 
        if (!ds->slave_mii_bus && ds->ops->phy_read) {
                ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);