diff options
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index ee1b35fe8572..8340f69670d8 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -320,6 +320,19 @@ void blk_cleanup_queue(struct request_queue *q) if (queue_is_mq(q)) blk_mq_exit_queue(q); + /* + * In theory, request pool of sched_tags belongs to request queue. + * However, the current implementation requires tag_set for freeing + * requests, so free the pool now. + * + * Queue has become frozen, there can't be any in-queue requests, so + * it is safe to free requests now. + */ + mutex_lock(&q->sysfs_lock); + if (q->elevator) + blk_mq_sched_free_requests(q); + mutex_unlock(&q->sysfs_lock); + percpu_ref_exit(&q->q_usage_counter); /* @q is and will stay empty, shutdown and put */ |