openwrtv3/target/linux/ipq806x/patches-4.9/0056-cpufreq-dt-Add-missing-rcu-locks.patch
John Crispin 1adf51702e ipq806x: clean up patches, port missing patches from 4.4
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2017-03-13 13:40:55 +01:00

23 lines
704 B
Diff

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) {