diff options
| -rw-r--r-- | drivers/md/dm-io.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 352c6fbeac53..f3a772486437 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -293,7 +293,10 @@ static void do_region(int rw, unsigned int region, struct io_region *where, * bvec for bio_get/set_region() and decrement bi_max_vecs * to hide it from bio_add_page(). */ - num_bvecs = (remaining / (PAGE_SIZE >> SECTOR_SHIFT)) + 2; + num_bvecs = dm_sector_div_up(remaining, + (PAGE_SIZE >> SECTOR_SHIFT)); + num_bvecs = 1 + min_t(int, bio_get_nr_vecs(where->bdev), + num_bvecs); bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios); bio->bi_sector = where->sector + (where->count - remaining); bio->bi_bdev = where->bdev; |