[PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk

[Ming Lei <ming.lei@redhat.com>]

Add one helper of disk_release_queue for releasing queue data for disk.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 block/genhd.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 5bd7bcd6246e..a86027619683 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1085,6 +1085,20 @@ static const struct attribute_group *disk_attr_groups[] = {
 	NULL
 };
 
+static void disk_release_queue(struct gendisk *disk)
+{
+	struct request_queue *q = disk->queue;
+
+	blk_mq_cancel_work_sync(q);
+
+	/*
+	 * Remove all references to @q from the block cgroup controller before
+	 * restoring @q->queue_lock to avoid that restoring this pointer causes
+	 * e.g. blkcg_print_blkgs() to crash.
+	 */
+	blkcg_exit_queue(q);
+}
+
 /**
  * disk_release - releases all allocated resources of the gendisk
  * @dev: the device representing this disk
@@ -1106,19 +1120,12 @@ static void disk_release(struct device *dev)
 	might_sleep();
 	WARN_ON_ONCE(disk_live(disk));
 
-	blk_mq_cancel_work_sync(disk->queue);
+	disk_release_queue(disk);
 
 	disk_release_events(disk);
 	kfree(disk->random);
 	xa_destroy(&disk->part_tbl);
 
-	/*
-	 * Remove all references to @q from the block cgroup controller before
-	 * restoring @q->queue_lock to avoid that restoring this pointer causes
-	 * e.g. blkcg_print_blkgs() to crash.
-	 */
-	blkcg_exit_queue(disk->queue);
-
 	disk->queue->disk = NULL;
 	blk_put_queue(disk->queue);
 	iput(disk->part0->bd_inode);	/* frees the disk */
-- 
2.31.1