From 7577ff1db8d82a5839887603c785d0591d0ebaf4 Mon Sep 17 00:00:00 2001
From: Ankur Arora <ankur.a.arora@oracle.com>
Date: Wed, 6 Sep 2017 12:47:52 -0700
Subject: [PATCH] blk-mq: add missing blk_mq_put_ctx

In case of failure to queue to the lower level driver, we
enqueue it via blk_mq_insert_request() and return while
holding a cpu reference.

Give up the currently held reference before calling
blk_mq_insert_request().

Orabug: 26339553

Suggested-by: Bhavesh Davda <bhavesh.davda@oracle.com>
Reviewed-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
---
 block/blk-mq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 93246bc6ec75..ef97afd4a473 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1273,6 +1273,7 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
 				blk_mq_end_request(rq, rq->errors);
 				goto done;
 			}
+			blk_mq_put_ctx(data.ctx);
 			blk_mq_insert_request(rq, false, true, true);
 			return;
 		}
-- 
2.50.1