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thermal: cpu_cooling: Fix power calculation when CPUs are offline

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Ensure that the CPU for which the frequency is being requested
is online. If none of the CPUs are online the requested power is
returned as 0.

Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Kapileshwar Singh 2015-03-16 12:00:51 +00:00 committed by Eduardo Valentin
parent 54b92aae83
commit dd658e0235
1 changed files with 12 additions and 1 deletions
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13
drivers/thermal/cpu_cooling.c
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@ -559,7 +559,18 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
struct cpufreq_cooling_device *cpufreq_device = cdev->devdata;
u32 *load_cpu = NULL;
freq = cpufreq_quick_get(cpumask_any(&cpufreq_device->allowed_cpus));
cpu = cpumask_any_and(&cpufreq_device->allowed_cpus, cpu_online_mask);
/*
* All the CPUs are offline, thus the requested power by
* the cdev is 0
*/
if (cpu >= nr_cpu_ids) {
*power = 0;
return 0;
}
freq = cpufreq_quick_get(cpu);
if (trace_thermal_power_cpu_get_power_enabled()) {
u32 ncpus = cpumask_weight(&cpufreq_device->allowed_cpus);