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-rw-r--r--drivers/md/dm-cache-target.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 265f83419de2..1a75869d3a82 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -2175,20 +2175,18 @@ static int cache_map(struct dm_target *ti, struct bio *bio)
bool discarded_block;
struct dm_bio_prison_cell *cell;
struct policy_result lookup_result;
- struct per_bio_data *pb;
+ struct per_bio_data *pb = init_per_bio_data(bio, pb_data_size);
- if (from_oblock(block) > from_oblock(cache->origin_blocks)) {
+ if (unlikely(from_oblock(block) >= from_oblock(cache->origin_blocks))) {
/*
* This can only occur if the io goes to a partial block at
* the end of the origin device. We don't cache these.
* Just remap to the origin and carry on.
*/
- remap_to_origin_clear_discard(cache, bio, block);
+ remap_to_origin(cache, bio);
return DM_MAPIO_REMAPPED;
}
- pb = init_per_bio_data(bio, pb_data_size);
-
if (bio->bi_rw & (REQ_FLUSH | REQ_FUA | REQ_DISCARD)) {
defer_bio(cache, bio);
return DM_MAPIO_SUBMITTED;