1 files changed, 4 insertions, 8 deletions

diff --git a/block/blk-merge.c b/block/blk-merge.c
index d926a24bf1fd..c77196d55899 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -390,17 +390,13 @@ static int attempt_merge(struct request_queue *q, struct request *req,
                 struct hd_struct *part;
                 int cpu;
 
-                cpu = disk_stat_lock();
+                cpu = part_stat_lock();
                 part = disk_map_sector_rcu(req->rq_disk, req->sector);
 
-                disk_round_stats(cpu, req->rq_disk);
-                req->rq_disk->in_flight--;
-                if (part) {
-                        part_round_stats(cpu, part);
-                        part->in_flight--;
-                }
+                part_round_stats(cpu, part);
+                part_dec_in_flight(part);
 
-                disk_stat_unlock();
+                part_stat_unlock();
         }
 
         req->ioprio = ioprio_best(req->ioprio, next->ioprio);