From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Tue, 6 Mar 2018 15:54:06 +0530
Subject: w1: use put_device() if device_register() fail
Git-commit: 0ec4eb71b4956548a9c652f6c26232995916008c
Patch-mainline: v4.17-rc1
References: jsc#SLE-11048

If device_register() returned an error! Always use put_device()
to give up the reference initialized in device_register().

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/w1/w1.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 0c2a5a8327bd..80a778b02f28 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -706,6 +706,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl)
 		dev_err(&sl->dev,
 			"Device registration [%s] failed. err=%d\n",
 			dev_name(&sl->dev), err);
+		put_device(&sl->dev);
 		return err;
 	}
 	w1_family_notify(BUS_NOTIFY_ADD_DEVICE, sl);