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-rw-r--r--block/blk-sysfs.c16
-rw-r--r--block/genhd.c31
2 files changed, 30 insertions, 17 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index af5a6d86073f..85c4ba006671 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -739,20 +739,6 @@ static void blk_free_queue_rcu(struct rcu_head *rcu_head)
kmem_cache_free(blk_get_queue_kmem_cache(blk_queue_has_srcu(q)), q);
}
-/* Unconfigure the I/O scheduler and dissociate from the cgroup controller. */
-static void blk_exit_queue(struct request_queue *q)
-{
- /*
- * Since the I/O scheduler exit code may access cgroup information,
- * perform I/O scheduler exit before disassociating from the block
- * cgroup controller.
- */
- if (q->elevator) {
- ioc_clear_queue(q);
- elevator_exit(q);
- }
-}
-
/**
* blk_release_queue - releases all allocated resources of the request_queue
* @kobj: pointer to a kobject, whose container is a request_queue
@@ -786,8 +772,6 @@ static void blk_release_queue(struct kobject *kobj)
blk_stat_remove_callback(q, q->poll_cb);
blk_stat_free_callback(q->poll_cb);
- blk_exit_queue(q);
-
blk_free_queue_stats(q->stats);
kfree(q->poll_stat);
diff --git a/block/genhd.c b/block/genhd.c
index fc10aedab209..73705a749ea9 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1098,6 +1098,34 @@ static const struct attribute_group *disk_attr_groups[] = {
NULL
};
+static void disk_release_mq(struct request_queue *q)
+{
+ blk_mq_cancel_work_sync(q);
+
+ /*
+ * There can't be any non non-passthrough bios in flight here, but
+ * requests stay around longer, including passthrough ones so we
+ * still need to freeze the queue here.
+ */
+ blk_mq_freeze_queue(q);
+
+ /*
+ * Since the I/O scheduler exit code may access cgroup information,
+ * perform I/O scheduler exit before disassociating from the block
+ * cgroup controller.
+ */
+ if (q->elevator) {
+ ioc_clear_queue(q);
+
+ mutex_lock(&q->sysfs_lock);
+ blk_mq_sched_free_rqs(q);
+ elevator_exit(q);
+ mutex_unlock(&q->sysfs_lock);
+ }
+
+ __blk_mq_unfreeze_queue(q, true);
+}
+
/**
* disk_release - releases all allocated resources of the gendisk
* @dev: the device representing this disk
@@ -1119,7 +1147,8 @@ static void disk_release(struct device *dev)
might_sleep();
WARN_ON_ONCE(disk_live(disk));
- blk_mq_cancel_work_sync(disk->queue);
+ if (queue_is_mq(disk->queue))
+ disk_release_mq(disk->queue);
blkcg_exit_queue(disk->queue);