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cpufreq: Manage only online cpus

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cpufreq core doesn't manage offline cpus and if driver->init() has returned
mask including offline cpus, it may result in unwanted behavior by cpufreq core
or governors.

We need to get only online cpus in this mask. There are two places to fix this
mask, cpufreq core and cpufreq driver. It makes sense to do this at common place
and hence is done in core.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2013-01-12 05:14:38 +00:00 committed by Rafael J. Wysocki
parent 8ee2ec51d0
commit 643ae6e81d
1 changed files with 7 additions and 0 deletions
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7
drivers/cpufreq/cpufreq.c
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@ -970,6 +970,13 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
pr_debug("initialization failed\n");
goto err_unlock_policy;
}
/*
* affected cpus must always be the one, which are online. We aren't
* managing offline cpus here.
*/
cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
policy->user_policy.min = policy->min;
policy->user_policy.max = policy->max;