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

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>
This commit is contained in:
Jens Axboe 2023-02-24 09:59:44 -07:00
parent 9f6ad5d533
commit 11eb695feb
1 changed files with 1 additions and 0 deletions
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block/bio.c
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@ -772,6 +772,7 @@ 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 {