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block: clear bio->bi_bdev when putting a bio back in the cache 

commit 11eb695feb 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: be4d234d7a ("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>
This commit is contained in:
Jens Axboe 2023-02-24 09:59:44 -07:00 committed by Greg Kroah-Hartman
parent 3dbd3d1b33
commit 6b6676da6b
1 changed files with 1 additions and 0 deletions
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block/bio.c
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@ -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 {