1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index a34338567a2a..36e2b5e46a6b 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -292,6 +292,8 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where,
                                              (PAGE_SIZE >> SECTOR_SHIFT));
                 num_bvecs = 1 + min_t(int, bio_get_nr_vecs(where->bdev),
                                       num_bvecs);
+                if (unlikely(num_bvecs > BIO_MAX_PAGES))
+                        num_bvecs = BIO_MAX_PAGES;
                 bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios);
                 bio->bi_sector = where->sector + (where->count - remaining);
                 bio->bi_bdev = where->bdev;
@@ -328,7 +330,7 @@ static void dispatch_io(int rw, unsigned int num_regions,
         struct dpages old_pages = *dp;
 
         if (sync)
-                rw |= (1 << BIO_RW_SYNC);
+                rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
 
         /*
          * For multiple regions we need to be careful to rewind