From 7c84e5e9c62cec8a3c49bf32ddabf2f285cb371b Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Tue, 6 Mar 2018 15:35:43 +0530
Subject: [PATCH] workqueue: use put_device() instead of kfree()

[ Upstream commit 537f4146c53c95aac977852b371bafb9c6755ee1 ]

Never directly free @dev after calling device_register(), even
if it returned an error! Always use put_device() to give up the
reference initialized in this function instead.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index d0c6b50..d8a7f89 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5350,7 +5350,7 @@ int workqueue_sysfs_register(struct workqueue_struct *wq)
 
 	ret = device_register(&wq_dev->dev);
 	if (ret) {
-		kfree(wq_dev);
+		put_device(&wq_dev->dev);
 		wq->wq_dev = NULL;
 		return ret;
 	}
-- 
2.7.4