diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-io.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 03940bf36f6c..b808cbe22678 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -328,11 +328,17 @@ static void do_region(int op, int op_flags, unsigned region, /* * Allocate a suitably sized-bio. */ - if ((op == REQ_OP_DISCARD) || (op == REQ_OP_WRITE_SAME)) + switch (op) { + case REQ_OP_DISCARD: + num_bvecs = 0; + break; + case REQ_OP_WRITE_SAME: num_bvecs = 1; - else + break; + default: num_bvecs = min_t(int, BIO_MAX_PAGES, dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT))); + } bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios); bio->bi_iter.bi_sector = where->sector + (where->count - remaining); |