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-rw-r--r--lib/idr.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/idr.c b/lib/idr.c
index 7a785a0c2ea0..1c4f9281f412 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -220,8 +220,14 @@ build_up:
220 */ 220 */
221 while ((layers < (MAX_LEVEL - 1)) && (id >= (1 << (layers*IDR_BITS)))) { 221 while ((layers < (MAX_LEVEL - 1)) && (id >= (1 << (layers*IDR_BITS)))) {
222 layers++; 222 layers++;
223 if (!p->count) 223 if (!p->count) {
224 /* special case: if the tree is currently empty,
225 * then we grow the tree by moving the top node
226 * upwards.
227 */
228 p->layer++;
224 continue; 229 continue;
230 }
225 if (!(new = get_from_free_list(idp))) { 231 if (!(new = get_from_free_list(idp))) {
226 /* 232 /*
227 * The allocation failed. If we built part of 233 * The allocation failed. If we built part of