diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-cgroup.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 1b7fd1fc2f33..b7bf1cfdbb4b 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1110,10 +1110,14 @@ void blkcg_unpin_online(struct cgroup_subsys_state *blkcg_css) struct blkcg *blkcg = css_to_blkcg(blkcg_css); do { + struct blkcg *parent; + if (!refcount_dec_and_test(&blkcg->online_pin)) break; + + parent = blkcg_parent(blkcg); blkcg_destroy_blkgs(blkcg); - blkcg = blkcg_parent(blkcg); + blkcg = parent; } while (blkcg); } |