summaryrefslogtreecommitdiff
path: root/lib/idr.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/idr.c')
-rw-r--r--lib/idr.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/idr.c b/lib/idr.c
index 4046e29c0a99..e90d2d05d784 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -625,7 +625,14 @@ void *idr_get_next(struct idr *idp, int *nextidp)
return p;
}
- id += 1 << n;
+ /*
+ * Proceed to the next layer at the current level. Unlike
+ * idr_for_each(), @id isn't guaranteed to be aligned to
+ * layer boundary at this point and adding 1 << n may
+ * incorrectly skip IDs. Make sure we jump to the
+ * beginning of the next layer using round_up().
+ */
+ id = round_up(id + 1, 1 << n);
while (n < fls(id)) {
n += IDR_BITS;
p = *--paa;