linux-kernel - [PATCH 4/7] cpufreq: maple: fix possible object reference leak

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Date:   Mon, 1 Apr 2019 09:37:51 +0800
From:   Wen Yang <wen.yang99@....com.cn>
To:     linux-kernel@...r.kernel.org
Cc:     wang.yi59@....com.cn, Wen Yang <wen.yang99@....com.cn>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: [PATCH 4/7] cpufreq: maple: fix possible object reference leak

The call to of_cpu_device_node_get returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/cpufreq/maple-cpufreq.c:213:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 177, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@....com.cn>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
Viresh Kumar <viresh.kumar@...aro.org>
linux-pm@...r.kernel.org
linux-kernel@...r.kernel.org
---
 drivers/cpufreq/maple-cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/maple-cpufreq.c b/drivers/cpufreq/maple-cpufreq.c
index d9df893..a05f134 100644
--- a/drivers/cpufreq/maple-cpufreq.c
+++ b/drivers/cpufreq/maple-cpufreq.c
@@ -210,7 +210,7 @@ static int __init maple_cpufreq_init(void)
 	 */
 	valp = of_get_property(cpunode, "clock-frequency", NULL);
 	if (!valp)
-		return -ENODEV;
+		goto bail_noprops;
 	max_freq = (*valp)/1000;
 	maple_cpu_freqs[0].frequency = max_freq;
 	maple_cpu_freqs[1].frequency = max_freq/2;
-- 
2.9.5