diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/bfq-cgroup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c index 86a607cf19a1..ca5ffe26178e 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -634,6 +634,12 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq, bfq_bfqq_expire(bfqd, bfqd->in_service_queue, false, BFQQE_PREEMPTED); + /* + * get extra reference to prevent bfqq from being freed in + * next possible deactivate + */ + bfqq->ref++; + if (bfq_bfqq_busy(bfqq)) bfq_deactivate_bfqq(bfqd, bfqq, false, false); else if (entity->on_st) @@ -653,6 +659,8 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq, if (!bfqd->in_service_queue && !bfqd->rq_in_driver) bfq_schedule_dispatch(bfqd); + /* release extra ref taken above */ + bfq_put_queue(bfqq); } /** |