diff mbox series

[02/14] blk-mq: handle already freed tags gracefully in blk_mq_free_rqs

Message ID 20220308055200.735835-3-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/14] blk-mq: do not include passthrough requests in I/O accounting | expand

Commit Message

Christoph Hellwig March 8, 2022, 5:51 a.m. UTC 
From: Ming Lei <ming.lei@redhat.com>

To simplify further changes allow for double calling blk_mq_free_rqs on
a queue.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
[hch: split out from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 block/blk-mq.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index ab4b646551334..6fd0b0f652514 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3070,6 +3070,9 @@  void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
 	struct blk_mq_tags *drv_tags;
 	struct page *page;
 
+	if (list_empty(&tags->page_list))
+		return;
+
 	if (blk_mq_is_shared_tags(set->flags))
 		drv_tags = set->shared_tags;
 	else