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authorViresh Kumar <viresh.kumar@linaro.org>2017-03-21 11:36:06 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-30 09:35:18 +0200
commit17503963206584333b674740ba75b5079ea7e196 (patch)
tree0cd7bc57275f457e4f50f91cd47c9da49727720a /drivers
parente1af444e52ce1b08cd6534e61f8da7aa55b31880 (diff)
cpufreq: Restore policy min/max limits on CPU online
commit ff010472fb75670cb5c08671e820eeea3af59c87 upstream. On CPU online the cpufreq core restores the previous governor (or the previous "policy" setting for ->setpolicy drivers), but it does not restore the min/max limits at the same time, which is confusing, inconsistent and real pain for users who set the limits and then suspend/resume the system (using full suspend), in which case the limits are reset on all CPUs except for the boot one. Fix this by making cpufreq_online() restore the limits when an inactive policy is brought online. The commit log and patch are inspired from Rafael's earlier work. Reported-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/cpufreq/cpufreq.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 86fa9fdc8323..38b363f4316b 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1186,6 +1186,9 @@ static int cpufreq_online(unsigned int cpu)
for_each_cpu(j, policy->related_cpus)
per_cpu(cpufreq_cpu_data, j) = policy;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+ } else {
+ policy->min = policy->user_policy.min;
+ policy->max = policy->user_policy.max;
}
if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {