diff options
Diffstat (limited to 'drivers/md/dm-zero.c')
| -rw-r--r-- | drivers/md/dm-zero.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c index 766bc93006e6..b616f11d8473 100644 --- a/drivers/md/dm-zero.c +++ b/drivers/md/dm-zero.c @@ -35,16 +35,19 @@ static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv) */ static int zero_map(struct dm_target *ti, struct bio *bio) { - switch(bio_rw(bio)) { - case READ: + switch (bio_op(bio)) { + case REQ_OP_READ: + if (bio->bi_opf & REQ_RAHEAD) { + /* readahead of null bytes only wastes buffer cache */ + return -EIO; + } zero_fill_bio(bio); break; - case READA: - /* readahead of null bytes only wastes buffer cache */ - return -EIO; - case WRITE: + case REQ_OP_WRITE: /* writes get silently dropped */ break; + default: + return -EIO; } bio_endio(bio); |