[PATCH] md: Make sure bi_max_vecs is set properly in bio_split

Else a subsequent bio_clone might make a mess.

Signed-off-by: Neil Brown <neilb@suse.de>
Cc: "Don Dupuis" <dondster@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/bio.c b/fs/bio.c
index eb8fbc53f2cd73273c8639c4dcb0648b30d15f70..098c12b2d60a9d8028a6a8fbdb2b03ecca84e3ba 100644 (file)
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1116,6 +1116,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
        bp->bio1.bi_io_vec = &bp->bv1;
        bp->bio2.bi_io_vec = &bp->bv2;
 
+       bp->bio1.bi_max_vecs = 1;
+       bp->bio2.bi_max_vecs = 1;
+
        bp->bio1.bi_end_io = bio_pair_end_1;
        bp->bio2.bi_end_io = bio_pair_end_2;