thermal: cpu_cooling: Fix power calculation when CPUs are offline
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>
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index beffa55..6509c61 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -559,7 +559,18 @@
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);