linux-kernel - [PATCH AUTOSEL 4.9 05/11] ARM: versatile: Add missing of_node_put in dcscb

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Message-Id: <20220601140100.2005469-5-sashal@kernel.org>
Date:   Wed,  1 Jun 2022 10:00:54 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Peng Wu <wupeng58@...wei.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Sasha Levin <sashal@...nel.org>,
        liviu.dudau@....com, sudeep.holla@....com,
        lorenzo.pieralisi@....com, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.9 05/11] ARM: versatile: Add missing of_node_put in dcscb_init

From: Peng Wu <wupeng58@...wei.com>

[ Upstream commit 23b44f9c649bbef10b45fa33080cd8b4166800ae ]

The device_node pointer is returned by of_find_compatible_node
with refcount incremented. We should use of_node_put() to avoid
the refcount leak.

Signed-off-by: Peng Wu <wupeng58@...wei.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Link: https://lore.kernel.org/r/20220428230356.69418-1-linus.walleij@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/mach-vexpress/dcscb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
index 5cedcf572104..3e86cff1d4d3 100644
--- a/arch/arm/mach-vexpress/dcscb.c
+++ b/arch/arm/mach-vexpress/dcscb.c
@@ -146,6 +146,7 @@ static int __init dcscb_init(void)
 	if (!node)
 		return -ENODEV;
 	dcscb_base = of_iomap(node, 0);
+	of_node_put(node);
 	if (!dcscb_base)
 		return -EADDRNOTAVAIL;
 	cfg = readl_relaxed(dcscb_base + DCS_CFG_R);
-- 
2.35.1