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block: remove a bogus warning in __submit_bio_noacct_mq 

If blk_mq_submit_bio flushes the plug list, bios for other disks can
show up on current->bio_list.  As that doesn't involve any stacking of
block device it is entirely harmless and we should not warn about
this case.

Fixes: ff93ea0ce7 ("block: shortcut __submit_bio_noacct for blk-mq drivers")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-07-07 19:45:03 +02:00 committed by Jens Axboe
parent 7c792f33c1
commit 0e6e255e7a
1 changed files with 1 additions and 2 deletions
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3
block/blk-core.c
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@ -1154,14 +1154,13 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
{
struct gendisk *disk = bio->bi_disk;
struct bio_list bio_list[2] = { };
blk_qc_t ret = BLK_QC_T_NONE;
current->bio_list = bio_list;
do {
WARN_ON_ONCE(bio->bi_disk != disk);
struct gendisk *disk = bio->bi_disk;
if (unlikely(bio_queue_enter(bio) != 0))
continue;