diff --git a/drivers/of/base.c b/drivers/of/base.c
index 07b8cd7..769b642 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -400,6 +400,9 @@
 {
 	struct device_node *np;
 
+	if (!from)
+		from = root_node;
+
 	of_tree_for_each_node_from(np, from) {
 		struct property *pp = of_find_property(np, prop_name, NULL);
 		if (pp)