From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 24 Feb 2023 09:59:44 -0700
Subject: [PATCH] block: clear bio->bi_bdev when putting a bio back in the
 cache
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 11eb695feb636fa5211067189cad25ac073e7fe5

commit 11eb695feb636fa5211067189cad25ac073e7fe5 upstream.

This isn't strictly needed in terms of correctness, but it does allow
polling to know if the bio has been put already by a different task
and hence avoid polling something that we don't need to.

Cc: stable@vger.kernel.org
Fixes: be4d234d7aeb ("bio: add allocation cache abstraction")
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 block/bio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/bio.c b/block/bio.c
index ab59a491..4e7d1167 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -773,6 +773,7 @@ static inline void bio_put_percpu_cache(struct bio *bio)
 
 	if ((bio->bi_opf & REQ_POLLED) && !WARN_ON_ONCE(in_interrupt())) {
 		bio->bi_next = cache->free_list;
+		bio->bi_bdev = NULL;
 		cache->free_list = bio;
 		cache->nr++;
 	} else {
-- 
2.35.3