linux-kernel - [PATCH] cpufreq: pmac32-cpufreq: Fix refcount leak bug

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Message-Id: <20220618022545.4056299-1-windhl@126.com>
Date:   Sat, 18 Jun 2022 10:25:45 +0800
From:   Liang He <windhl@....com>
To:     rafael@...nel.org, viresh.kumar@...aro.org, mpe@...erman.id.au,
        benh@...nel.crashing.org, paulus@...ba.org
Cc:     windhl@....com, linux-pm@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] cpufreq: pmac32-cpufreq: Fix refcount leak bug

In pmac_cpufreq_init_MacRISC3(), we need to add corresponding
of_node_put() for the three node pointers whose refcount have
been incremented by of_find_node_by_name().

Signed-off-by: Liang He <windhl@....com>
---
 drivers/cpufreq/pmac32-cpufreq.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c
index 20f64a8b0a35..4b8ee2014da6 100644
--- a/drivers/cpufreq/pmac32-cpufreq.c
+++ b/drivers/cpufreq/pmac32-cpufreq.c
@@ -470,6 +470,10 @@ static int pmac_cpufreq_init_MacRISC3(struct device_node *cpunode)
 	if (slew_done_gpio_np)
 		slew_done_gpio = read_gpio(slew_done_gpio_np);
 
+	of_node_put(volt_gpio_np);
+	of_node_put(freq_gpio_np);
+	of_node_put(slew_done_gpio_np);
+
 	/* If we use the frequency GPIOs, calculate the min/max speeds based
 	 * on the bus frequencies
 	 */
-- 
2.25.1