linux-kernel - [PATCH] mips: lantiq: xway: Fix refcount leak bug in sysctrl

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Message-Id: <20220617122505.4048126-1-windhl@126.com>
Date:   Fri, 17 Jun 2022 20:25:05 +0800
From:   Liang He <windhl@....com>
To:     john@...ozen.org, tsbogend@...ha.franken.de,
        xkernel.wang@...mail.com
Cc:     windhl@....com, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mips: lantiq: xway: Fix refcount leak bug in sysctrl

In ltq_soc_init(), of_find_compatible_node() will return a node
pointer with refcount incremented. We should use of_node_put() when
it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 arch/mips/lantiq/xway/sysctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c
index 084f6caba5f2..d444a1b98a72 100644
--- a/arch/mips/lantiq/xway/sysctrl.c
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -441,6 +441,10 @@ void __init ltq_soc_init(void)
 			of_address_to_resource(np_ebu, 0, &res_ebu))
 		panic("Failed to get core resources");
 
+	of_node_put(np_pmu);
+	of_node_put(np_cgu);
+	of_node_put(np_ebu);
+
 	if (!request_mem_region(res_pmu.start, resource_size(&res_pmu),
 				res_pmu.name) ||
 		!request_mem_region(res_cgu.start, resource_size(&res_cgu),
-- 
2.25.1