From: Junichi Nomura Date: Tue, 22 Dec 2015 17:23:44 +0000 (-0700) Subject: block: ensure to split after potentially bouncing a bio X-Git-Tag: submit/tizen/20160607.132125~1210^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=23688bf4f830a89866fd0ed3501e342a7360fe4f;p=sdk%2Femulator%2Femulator-kernel.git block: ensure to split after potentially bouncing a bio blk_queue_bio() does split then bounce, which makes the segment counting based on pages before bouncing and could go wrong. Move the split to after bouncing, like we do for blk-mq, and the we fix the issue of having the bio count for segments be wrong. Fixes: 54efd50bfd87 ("block: make generic_make_request handle arbitrarily sized bios") Cc: stable@vger.kernel.org Tested-by: Artem S. Tashkinov Signed-off-by: Jens Axboe --- diff --git a/block/blk-core.c b/block/blk-core.c index 3636be4..c487b94 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1689,8 +1689,6 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) struct request *req; unsigned int request_count = 0; - blk_queue_split(q, &bio, q->bio_split); - /* * low level driver can indicate that it wants pages above a * certain limit bounced to low memory (ie for highmem, or even @@ -1698,6 +1696,8 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) */ blk_queue_bounce(q, &bio); + blk_queue_split(q, &bio, q->bio_split); + if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) { bio->bi_error = -EIO; bio_endio(bio);