centosplus patch

Patch provided by RH in BZ#1671551

diff --git a/block/blk-mq.c b/block/blk-mq.c

index 645b4f138a6c..8492e7ca4ef8 100644

--- a/block/blk-mq.c

+++ b/block/blk-mq.c

@@ -76,6 +76,9 @@ static void blk_mq_check_inflight(struct blk_mq_hw_ctx *hctx,

 {

 	struct mq_inflight *mi = priv;

+	if (!blk_mq_request_started(rq))

+		return;

+

 	/*

 	 * index[0] counts the specific partition that was asked

 	 * for. index[1] counts the ones that are active on the

@@ -103,6 +106,9 @@ static void blk_mq_check_inflight_rw(struct blk_mq_hw_ctx *hctx,

 {

 	struct mq_inflight *mi = priv;

+	if (!blk_mq_request_started(rq))

+		return;

+

 	if (rq->part == mi->part)

 		mi->inflight[rq_data_dir(rq)]++;

 }