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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Miaoqian Lin <linmq006@gmail.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 16/31] ARM: meson: Fix refcount leak in meson_smp_prepare_cpus
Date:   Mon, 11 Jul 2022 11:06:55 +0200
Message-Id: <20220711090538.328749213@linuxfoundation.org>
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From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit 34d2cd3fccced12b958b8848e3eff0ee4296764c ]

of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: d850f3e5d296 ("ARM: meson: Add SMP bringup code for Meson8 and Meson8b")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220512021611.47921-1-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/mach-meson/platsmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-meson/platsmp.c b/arch/arm/mach-meson/platsmp.c
index cad7ee8f0d6b..75e16a2c3c81 100644
--- a/arch/arm/mach-meson/platsmp.c
+++ b/arch/arm/mach-meson/platsmp.c
@@ -81,6 +81,7 @@ static void __init meson_smp_prepare_cpus(const char *scu_compatible,
 	}
 
 	sram_base = of_iomap(node, 0);
+	of_node_put(node);
 	if (!sram_base) {
 		pr_err("Couldn't map SRAM registers\n");
 		return;
@@ -101,6 +102,7 @@ static void __init meson_smp_prepare_cpus(const char *scu_compatible,
 	}
 
 	scu_base = of_iomap(node, 0);
+	of_node_put(node);
 	if (!scu_base) {
 		pr_err("Couldn't map SCU registers\n");
 		return;
-- 
2.35.1