From e5dcdd80a60627371f40797426273048630dc8ca Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 9 Sep 2005 16:23:41 -0700 Subject: [PATCH] md: fail IO request to md that require a barrier. md does not yet support BIO_RW_BARRIER, so be honest about it and fail (-EOPNOTSUPP) any such requests. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/multipath.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/md/multipath.c') diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index 2d2ca7fa026..286342375fb 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -169,6 +169,11 @@ static int multipath_make_request (request_queue_t *q, struct bio * bio) struct multipath_bh * mp_bh; struct multipath_info *multipath; + if (unlikely(bio_barrier(bio))) { + bio_endio(bio, bio->bi_size, -EOPNOTSUPP); + return 0; + } + mp_bh = mempool_alloc(conf->pool, GFP_NOIO); mp_bh->master_bio = bio; -- cgit v1.2.3-70-g09d2