From 11eb695feb636fa5211067189cad25ac073e7fe5 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 24 Feb 2023 09:59:44 -0700 Subject: [PATCH] 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: be4d234d7aeb ("bio: add allocation cache abstraction") Reviewed-by: Keith Busch Signed-off-by: Jens Axboe --- block/bio.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/bio.c b/block/bio.c index 2693f34afb7e..605c40025068 100644 --- a/block/bio.c +++ b/block/bio.c @@ -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 {