diff --git a/[refs] b/[refs]
index 48ddfba68829..5310b60e2dbf 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3a845099b20e81fb678521f034bbdcd69208da4e
+refs/heads/master: 589777eab7360894b7ca1c4ba9d252e03b51225b
diff --git a/trunk/lib/idr.c b/trunk/lib/idr.c
index 81fc430602ee..c5be889de449 100644
--- a/trunk/lib/idr.c
+++ b/trunk/lib/idr.c
@@ -175,7 +175,7 @@ static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id)
 	 * Add a new layer to the top of the tree if the requested
 	 * id is larger than the currently allocated space.
 	 */
-	while ((layers < MAX_LEVEL) && (id >= (1 << (layers*IDR_BITS)))) {
+	while ((layers < (MAX_LEVEL - 1)) && (id >= (1 << (layers*IDR_BITS)))) {
 		layers++;
 		if (!p->count)
 			continue;