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[PATCH] md: fix splitting of md/linear request that cross a device boundary

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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 <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-05-16 21:53:15 -07:00 committed by Linus Torvalds
parent 8f332287bc
commit 29ac8e056f
1 changed files with 2 additions and 3 deletions
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5
drivers/md/linear.c
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@ -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))