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Commit 29ac8e05 authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
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[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: default avatarNeil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 8f332287

drivers/md/linear.c

+2 −3
Original line number Diff line number Diff line
@@ -270,8 +270,7 @@ static int linear_make_request (request_queue_t *q, struct bio *bio) 
		 */

		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);

			       ((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))