Enhanced partition statistics: update partition statitics

Updates the enhanced partition statistics in generic block layer
besides the disk statistics.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 845ef8131108..d3b84bbb776a 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -454,8 +454,14 @@ static int attempt_merge(struct request_queue *q, struct request *req,
         elv_merge_requests(q, req, next);
 
         if (req->rq_disk) {
+                struct hd_struct *part
+                        = get_part(req->rq_disk, req->sector);
                 disk_round_stats(req->rq_disk);
                 req->rq_disk->in_flight--;
+                if (part) {
+                        part_round_stats(part);
+                        part->in_flight--;
+                }
         }
 
         req->ioprio = ioprio_best(req->ioprio, next->ioprio);