Commit 22c52fa5 authored Mar 17, 2023 by Rafael J. Wysocki

ACPI: processor: thermal: Update CPU cooling devices on cpufreq policy changes



When a cpufreq policy appears or goes away, the CPU cooling devices for
the CPUs covered by that policy need to be updated so that the new
processor_get_max_state() value is stored as max_state and the
statistics in sysfs are rearranged for each of them.

Do that accordingly in acpi_thermal_cpufreq_init() and
acpi_thermal_cpufreq_exit().

Fixes: a365105c("thermal: sysfs: Reuse cdev->max_state")
Reported-by: Wang, Quanxian <quanxian.wang@intel.com>
Link: https://lore.kernel.org/linux-pm/53ec1f06f61c984100868926f282647e57ecfb2d.camel@intel.com


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>

parent 790930f4

drivers/acpi/processor_thermal.c

+11 −3

Original line number	Diff line number	Diff line
		@@ -140,9 +140,13 @@ void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
		ret = freq_qos_add_request(&policy->constraints,
		&pr->thermal_req,
		FREQ_QOS_MAX, INT_MAX);
		if (ret < 0)
		if (ret < 0) {
		pr_err("Failed to add freq constraint for CPU%d (%d)\n",
		cpu, ret);
		continue;
		}

		thermal_cooling_device_update(pr->cdev);
		}
		}

		@@ -153,8 +157,12 @@ void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
		for_each_cpu(cpu, policy->related_cpus) {
		struct acpi_processor *pr = per_cpu(processors, cpu);

		if (pr)
		if (!pr)
		continue;

		freq_qos_remove_request(&pr->thermal_req);

		thermal_cooling_device_update(pr->cdev);
		}
		}
		#else /* ! CONFIG_CPU_FREQ */