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block: initialize current->bio_list[1] in __submit_bio_noacct_mq 

bio_alloc_bioset references current->bio_list[1], so we need to
initialize it for the blk-mq submission path as well.

Fixes: ff93ea0ce7 ("block: shortcut __submit_bio_noacct for blk-mq drivers")
Reported-by: Qian Cai <cai@lca.pw>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-07-02 21:21:25 +02:00 committed by Jens Axboe
parent 4e2f62e566
commit 7c792f33c1
1 changed files with 3 additions and 4 deletions
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7
block/blk-core.c
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@ -1155,11 +1155,10 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
static blk_qc_t __submit_bio_noacct_mq(struct bio *bio) static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
{ {
struct gendisk *disk = bio->bi_disk; struct gendisk *disk = bio->bi_disk;
struct bio_list bio_list; struct bio_list bio_list[2] = { };
blk_qc_t ret = BLK_QC_T_NONE; blk_qc_t ret = BLK_QC_T_NONE;
bio_list_init(&bio_list); current->bio_list = bio_list;
current->bio_list = &bio_list;
do { do {
WARN_ON_ONCE(bio->bi_disk != disk); WARN_ON_ONCE(bio->bi_disk != disk);
@ -1174,7 +1173,7 @@ static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
} }
ret = blk_mq_submit_bio(bio); ret = blk_mq_submit_bio(bio);
} while ((bio = bio_list_pop(&bio_list))); } while ((bio = bio_list_pop(&bio_list[0])));
current->bio_list = NULL; current->bio_list = NULL;
return ret; return ret;