From 8bbf5b426160343b554117eb9abdf4dad9a50e65 Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Thu, 8 Mar 2018 15:27:37 +0530
Subject: [PATCH] pwm: sysfs: Use put_device() instead of kfree()

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

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/sysfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index 83f2b0b15712..7c71cdb8a9d8 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -273,7 +273,8 @@ static int pwm_export_child(struct device *parent, struct pwm_device *pwm)
 	ret = device_register(&export->child);
 	if (ret) {
 		clear_bit(PWMF_EXPORTED, &pwm->flags);
-		kfree(export);
+		put_device(&export->child);
+		export = NULL;
 		return ret;
 	}