From 29ac8e056f2016a8404edc02749d095019aa1f82 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 16 May 2005 21:53:15 -0700 Subject: [PATCH] [PATCH] md: fix splitting of md/linear request that cross a device boundary When a request crosses a boundary between devices, it needs to be split. But where we should calculate the amount of the request before the boundary to find the split-point, we care currently calculating the amount that is *after* the boundary !!! Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/linear.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 161e9aa87291..b1941b887f46 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -269,9 +269,8 @@ static int linear_make_request (request_queue_t *q, struct bio *bio) * split it. */ struct bio_pair *bp; - bp = bio_split(bio, bio_split_pool, - (bio->bi_sector + (bio->bi_size >> 9) - - (tmp_dev->offset + tmp_dev->size))<<1); + bp = bio_split(bio, bio_split_pool, + ((tmp_dev->offset + tmp_dev->size)<<1) - bio->bi_sector); if (linear_make_request(q, &bp->bio1)) generic_make_request(&bp->bio1); if (linear_make_request(q, &bp->bio2)) -- GitLab