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: ff93ea0ce763 ("block: shortcut __submit_bio_noacct for blk-mq drivers")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 9f1bf8658b611a..93104c7470e8ac 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -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;
--
2.26.2
