linux-kernel - [PATCH] pwm: sysfs: use put

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Message-Id: <416c89ec3cff87e842a0ff148df13bed35a44c46.1520502811.git.arvind.yadav.cs@gmail.com>
Date:   Thu,  8 Mar 2018 15:27:37 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     thierry.reding@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
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@...il.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 83f2b0b..7c71cdb 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;
 	}
 
-- 
1.9.1