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cpufreq: Always update current frequency before startig governor

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Make policy->cur match the current frequency returned by the driver's
->get() callback before starting the governor in case they went out of
sync in the meantime and drop the piece of code attempting to
resync policy->cur with the real frequency of the boot CPU from
cpufreq_resume() as it serves no purpose any more (and it's racy and
super-ugly anyway).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-03-21 15:47:48 +01:00
parent 999f572983
commit 3bbf8fe3ae
1 changed files with 3 additions and 11 deletions
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14
drivers/cpufreq/cpufreq.c
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@ -1612,17 +1612,6 @@ void cpufreq_resume(void)
__func__, policy);
}
}
/*
* schedule call cpufreq_update_policy() for first-online CPU, as that
* wouldn't be hotplugged-out on suspend. It will verify that the
* current freq is in sync with what we believe it to be.
*/
policy = cpufreq_cpu_get_raw(cpumask_first(cpu_online_mask));
if (WARN_ON(!policy))
return;
schedule_work(&policy->update);
}
/**
@ -1950,6 +1939,9 @@ static int cpufreq_start_governor(struct cpufreq_policy *policy)
{
int ret;
if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
cpufreq_update_current_freq(policy);
ret = cpufreq_governor(policy, CPUFREQ_GOV_START);
return ret ? ret : cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
}