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-rw-r--r--lib/idr.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/idr.c b/lib/idr.c
index 1cac726c44bc..ba7d37cf7847 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -140,8 +140,7 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
id = *starting_id;
restart:
p = idp->top;
- l = idp->layers;
- pa[l--] = NULL;
+ l = p->layer;
while (1) {
/*
* We run around this while until we reach the leaf node...
@@ -155,8 +154,8 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
oid = id;
id = (id | ((1 << (IDR_BITS * l)) - 1)) + 1;
- /* if already at the top layer, we need to grow */
- if (!(p = pa[l])) {
+ /* did id go over the limit? */
+ if (id >= (1 << (idp->layers * IDR_BITS))) {
*starting_id = id;
return IDR_NEED_TO_GROW;
}