[PATCH] md: make sure bitmap_daemon_work actually does work.

[linux-2.6] / drivers / md / multipath.c

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 2d2ca7fa0265261a71e2493e88b68403cc902c57..286342375fb7f84d5d400e28755e4347f7e99035 100644 (file)
--- 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;