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| author | Junichi Nomura <j-nomura@ce.jp.nec.com> | 2015-12-22 20:23:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-20 01:28:23 +0300 |
| commit | ecf177df3b63d88f6fb5e10683004f50b6dfe116 (patch) | |
| tree | 269c8859f8511adcbf33c6633f6a5e68e5380d6f | |
| parent | c854fc16ba94297c971fc93aebdfded3f543259e (diff) | |
| download | linux-ecf177df3b63d88f6fb5e10683004f50b6dfe116.tar.xz | |
block: ensure to split after potentially bouncing a bio
commit 23688bf4f830a89866fd0ed3501e342a7360fe4f upstream.
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")
Tested-by: Artem S. Tashkinov <t.artem@lycos.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | block/blk-core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 77f1fa3d4e0f..b128c1609347 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1616,8 +1616,6 @@ static void 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 @@ -1625,6 +1623,8 @@ static void 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); |