lib/idr.c: Fix bug introduced by RCU fix

[pandora-kernel.git] / lib / idr.c

diff --git a/lib/idr.c b/lib/idr.c
index 7a785a0..1c4f928 100644 (file)
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -220,8 +220,14 @@ build_up:
         */
        while ((layers < (MAX_LEVEL - 1)) && (id >= (1 << (layers*IDR_BITS)))) {
                layers++;
-               if (!p->count)
+               if (!p->count) {
+                       /* special case: if the tree is currently empty,
+                        * then we grow the tree by moving the top node
+                        * upwards.
+                        */
+                       p->layer++;
                        continue;
+               }
                if (!(new = get_from_free_list(idp))) {
                        /*
                         * The allocation failed.  If we built part of