From ac262508daa88fb12c5dc53cf30bde163f9f26c9 Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 9 Apr 2020 09:09:00 -0700
Subject: [PATCH] nvme: release namespace head reference on error

If a namespace identification does not match the subsystem's head for
that NSID, release the reference that was taken when the matching head
was initially found.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 15b9e60be204..f2dc89dd2e1c 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3503,6 +3503,7 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
 				"IDs don't match for shared namespace %d\n",
 					nsid);
 			ret = -EINVAL;
+			nvme_put_ns_head(head);
 			goto out_unlock;
 		}
 	}