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| author | Ming Lei <ming.lei@canonical.com> | 2015-11-30 16:05:49 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-11-30 13:02:36 -0700 |
| commit | a88d32af18b8a6616128c971f766eaf545966405 (patch) | |
| tree | 3cfc7528e641317aa7a56f82af569b03015ccdd1 /block/blk-merge.c | |
| parent | 74cedf9b6c603f2278a05bc91b140b32b434d0b5 (diff) | |
| download | linux-a88d32af18b8a6616128c971f766eaf545966405.tar.gz linux-a88d32af18b8a6616128c971f766eaf545966405.tar.bz2 linux-a88d32af18b8a6616128c971f766eaf545966405.zip | |
blk-merge: fix computing bio->bi_seg_front_size in case of single segment
When bio has only one physical segment, we should set bio's
bi_seg_front_size as the real(final) size of the single segment.
Fixes: 02e707424c2ea(blk-merge: fix blk_bio_segment_split)
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 41a55ba0d78e..e01405a3e8b3 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -103,6 +103,9 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, bvprv = bv; bvprvp = &bvprv; sectors += bv.bv_len >> 9; + + if (nsegs == 1 && seg_size > front_seg_size) + front_seg_size = seg_size; continue; } new_segment: |