Commit 10b41ea1 authored by Bart Van Assche's avatar Bart Van Assche Committed by Jens Axboe
Browse files

null_blk: Modify the behavior of null_map_queues() 



Instead of returning -EINVAL if an internal inconsistency is detected,
fall back to a single submission queue. This patch prepares for changing
the return value of the .map_queues() callbacks into void.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Keith Busch <kbusch@kernel.org>
Signed-off-by: default avatarBart Van Assche <bvanassche@acm.org>
Reviewed-by: default avatarChaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220815170043.19489-2-bvanassche@acm.org


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 74e237b6

drivers/block/null_blk/main.c

+3 −1
Original line number Diff line number Diff line
@@ -1555,7 +1555,9 @@ static int null_map_queues(struct blk_mq_tag_set *set) 
		} else {

			pr_warn("tag set has unexpected nr_hw_queues: %d\n",

				set->nr_hw_queues);

			return -EINVAL;

			WARN_ON_ONCE(true);

			submit_queues = 1;

			poll_queues = 0;

		}

	}