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path: root/target/linux/ipq806x/patches-4.14/0056-cpufreq-dt-Add-missing-rcu-locks.patch
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From 001a8dcb56ced58c518aaa10a4f0ba5e878705b6 Mon Sep 17 00:00:00 2001
From: Georgi Djakov <georgi.djakov@linaro.org>
Date: Tue, 17 May 2016 16:15:43 +0300
Subject: [PATCH 56/69] cpufreq-dt: Add missing rcu locks

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
 drivers/cpufreq/cpufreq-dt.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -143,8 +143,10 @@ static int opp_notifier(struct notifier_
			ret = PTR_ERR(cpu_reg);
			goto out;
		}
+		rcu_read_lock();
		volt = dev_pm_opp_get_voltage(opp);
		freq = dev_pm_opp_get_freq(opp);
+		rcu_read_unlock();

		mutex_lock(&priv->lock);
		if (freq == priv->opp_freq) {