linux-kernel - [PATCH] ARM: meson: Fix refcount leak in meson_smp_prepare

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Message-Id: <20220512021611.47921-1-linmq006@gmail.com>
Date:   Thu, 12 May 2022 06:16:10 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Russell King <linux@...linux.org.uk>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Carlo Caione <carlo@...lessm.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] ARM: meson: Fix refcount leak in meson_smp_prepare_cpus

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@...il.com>
---
 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 4b8ad728bb42..32ac60b89fdc 100644
--- a/arch/arm/mach-meson/platsmp.c
+++ b/arch/arm/mach-meson/platsmp.c
@@ -71,6 +71,7 @@ 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;
@@ -91,6 +92,7 @@ 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;
-- 
2.25.1