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authorNeilBrown <neilb@cse.unsw.edu.au>2005-05-16 21:53:15 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-17 07:59:11 -0700
commit29ac8e056f2016a8404edc02749d095019aa1f82 (patch)
treee397738144d80b3c3d78edde36ab739892f4d3dc /drivers/md/linear.c
parent8f332287bc3f2801ba43682fd79baf24dc8ac1ce (diff)
[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 <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/linear.c')
-rw-r--r--drivers/md/linear.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 161e9aa8729..b1941b887f4 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))