diff options
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index 17a8b0aa7050..bbfeb4ee2892 100644 --- a/block/bio.c +++ b/block/bio.c @@ -2084,6 +2084,26 @@ int bio_associate_create_blkg(struct request_queue *q, struct bio *bio) } /** + * bio_reassociate_blkg - reassociate a bio with a blkg from q + * @q: request_queue where bio is going + * @bio: target bio + * + * When submitting a bio, multiple recursive calls to make_request() may occur. + * This causes the initial associate done in blkcg_bio_issue_check() to be + * incorrect and reference the prior request_queue. This performs reassociation + * when this situation happens. + */ +int bio_reassociate_blkg(struct request_queue *q, struct bio *bio) +{ + if (bio->bi_blkg) { + blkg_put(bio->bi_blkg); + bio->bi_blkg = NULL; + } + + return bio_associate_create_blkg(q, bio); +} + +/** * bio_disassociate_task - undo bio_associate_current() * @bio: target bio */ |