linux-kernel - [PATCH] clocksource: decrement reference count when device

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Message-Id: <20190121153431.24789-1-tiny.windzz@gmail.com>
Date:   Mon, 21 Jan 2019 10:34:31 -0500
From:   Yangtao Li <tiny.windzz@...il.com>
To:     john.stultz@...aro.org, tglx@...utronix.de, sboyd@...nel.org
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH] clocksource: decrement reference count when device_register() fail

device_register() may fail, use put_device() giving up the refconut
to avoid refcount leak.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 kernel/time/clocksource.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 3bcc19ceb073..0a830fedc7ef 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -1183,8 +1183,11 @@ static int __init init_clocksource_sysfs(void)
 {
 	int error = subsys_system_register(&clocksource_subsys, NULL);
 
-	if (!error)
+	if (!error) {
 		error = device_register(&device_clocksource);
+		if (error)
+			put_device(&device_clocksource);
+	}
 
 	return error;
 }
-- 
2.17.0