Commit a88d32af authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe

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: 02e70742(blk-merge: fix blk_bio_segment_split)
Reported-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
Tested-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 74cedf9b
......@@ -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:
......
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