Index: sys/dev/mii/mii_fdt.c
===================================================================
--- sys/dev/mii/mii_fdt.c
+++ sys/dev/mii/mii_fdt.c
@@ -326,20 +326,6 @@
 	return (&ma->obd);
 }
 
-static ssize_t
-miibus_fdt_get_property(device_t bus, device_t child, const char *propname,
-    void *buf, size_t size)
-{
-	struct mii_attach_args *ma;
-
-	ma = device_get_ivars(child);
-
-	if (ma->obd.obd_node == 0)
-		return (-1);
-
-	return (OF_getencprop(ma->obd.obd_node, propname, buf, size));
-}
-
 static device_method_t miibus_fdt_methods[] = {
 	DEVMETHOD(device_probe,		miibus_fdt_probe),
 	DEVMETHOD(device_attach,	miibus_fdt_attach),
@@ -362,7 +348,6 @@
 	DEVMETHOD(bus_get_resource,		bus_generic_rl_get_resource),
 	DEVMETHOD(bus_set_resource,		bus_generic_rl_set_resource),
 	DEVMETHOD(bus_get_resource_list,	miibus_fdt_get_resource_list),
-	DEVMETHOD(bus_get_property,		miibus_fdt_get_property),
 
 	DEVMETHOD_END
 };
Index: sys/kern/bus_if.m
===================================================================
--- sys/kern/bus_if.m
+++ sys/kern/bus_if.m
@@ -78,9 +78,13 @@
 	}
 
 	static ssize_t
-	null_get_property(device_t dev, device_t child, const char *propname,
+	get_property_default(device_t bus, device_t dev, const char *propname,
 	    void *propvalue, size_t size)
 	{
+		if (device_get_parent(bus) != NULL) {
+			return (BUS_GET_PROPERTY(device_get_parent(bus), dev,
+			    propname, propvalue, size));
+		}
 		return (-1);
 	}
 };
@@ -944,4 +948,4 @@
 	const char *_propname;
 	void *_propvalue;
 	size_t _size;
-} DEFAULT null_get_property;
+} DEFAULT get_property_default;