diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index b0ce2ce..bbf861e 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -868,7 +868,7 @@
 {
 	struct exception *e;
 	struct dm_snapshot *s = (struct dm_snapshot *) ti->private;
-	int r = 1;
+	int r = DM_MAPIO_REMAPPED;
 	chunk_t chunk;
 	struct pending_exception *pe = NULL;
 
@@ -914,7 +914,7 @@
 		remap_exception(s, &pe->e, bio);
 		bio_list_add(&pe->snapshot_bios, bio);
 
-		r = 0;
+		r = DM_MAPIO_SUBMITTED;
 
 		if (!pe->started) {
 			/* this is protected by snap->lock */
@@ -992,7 +992,7 @@
  *---------------------------------------------------------------*/
 static int __origin_write(struct list_head *snapshots, struct bio *bio)
 {
-	int r = 1, first = 0;
+	int r = DM_MAPIO_REMAPPED, first = 0;
 	struct dm_snapshot *snap;
 	struct exception *e;
 	struct pending_exception *pe, *next_pe, *primary_pe = NULL;
@@ -1050,7 +1050,7 @@
 
 			bio_list_add(&primary_pe->origin_bios, bio);
 
-			r = 0;
+			r = DM_MAPIO_SUBMITTED;
 		}
 
 		if (!pe->primary_pe) {
@@ -1099,7 +1099,7 @@
 static int do_origin(struct dm_dev *origin, struct bio *bio)
 {
 	struct origin *o;
-	int r = 1;
+	int r = DM_MAPIO_REMAPPED;
 
 	down_read(&_origins_lock);
 	o = __lookup_origin(origin->bdev);
@@ -1156,7 +1156,7 @@
 		return -EOPNOTSUPP;
 
 	/* Only tell snapshots if this is a write */
-	return (bio_rw(bio) == WRITE) ? do_origin(dev, bio) : 1;
+	return (bio_rw(bio) == WRITE) ? do_origin(dev, bio) : DM_MAPIO_REMAPPED;
 }
 
 #define min_not_zero(l, r) (l == 0) ? r : ((r == 0) ? l : min(l, r))