From: Jacob Shin <jacob.shin@amd.com>
Date: Thu, 27 Jun 2013 20:02:12 +0000 (+0200)
Subject: cpufreq: don't leave stale policy pointer in cdbs->cur_policy
X-Git-Tag: firefly_0821_release~4090^2~380
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0d7892920bf7061cca287e0d7b5a23e344d5adfb;p=firefly-linux-kernel-4.4.55.git

cpufreq: don't leave stale policy pointer in cdbs->cur_policy

Clear ->cur_policy when stopping a governor, or the ->cur_policy
pointer may be stale on systems with have_governor_per_policy when a
new policy is allocated due to CPU hotplug offline/online.

[rjw: Changelog]
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index bf03b3001741..1361bd432691 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -396,6 +396,7 @@ int cpufreq_governor_dbs(struct cpufreq_policy *policy,
 
 		mutex_lock(&dbs_data->mutex);
 		mutex_destroy(&cpu_cdbs->timer_mutex);
+		cpu_cdbs->cur_policy = NULL;
 
 		mutex_unlock(&dbs_data->mutex);