dm thin: use dm_target_offset

Use dm_target_offset wrapper instead of referencing the awkward ti->begin
explicitly.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 2d9e75586d60..7ca2bf2aafaa 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2389,7 +2389,7 @@ out_unlock:
 static int thin_map(struct dm_target *ti, struct bio *bio,
                     union map_info *map_context)
 {
-        bio->bi_sector -= ti->begin;
+        bio->bi_sector = dm_target_offset(ti, bio->bi_sector);
 
         return thin_bio_map(ti, bio, map_context);
 }