ACPI: Notify the _PPC evaluation status to the platform
According to the ACPI spec(section 8.4.4.3) OSPM should convey the _PPC
evaluations status to the platform if there exists the _OST object.
The _OST contains two arguments:
The first is the PERFORMANCE notificatin event.
The second is the status of _PPC object.
OSPM will convey the _PPC evaluation status to the platform.
Of course when the module parameter of "ignore_ppc" is added, OSPM won't
evaluate the _PPC object. But it will call the _OST object.
At the same time the _OST object will be evaluated only when the PERFORMANCE
notification event is received.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index c567b46..773d7e7 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -722,7 +722,7 @@
switch (event) {
case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
saved = pr->performance_platform_limit;
- acpi_processor_ppc_has_changed(pr);
+ acpi_processor_ppc_has_changed(pr, 1);
if (saved == pr->performance_platform_limit)
break;
acpi_bus_generate_proc_event(device, event,
@@ -758,7 +758,7 @@
struct acpi_processor *pr = per_cpu(processors, cpu);
if (action == CPU_ONLINE && pr) {
- acpi_processor_ppc_has_changed(pr);
+ acpi_processor_ppc_has_changed(pr, 0);
acpi_processor_cst_has_changed(pr);
acpi_processor_tstate_has_changed(pr);
}
@@ -830,7 +830,7 @@
arch_acpi_processor_cleanup_pdc(pr);
#ifdef CONFIG_CPU_FREQ
- acpi_processor_ppc_has_changed(pr);
+ acpi_processor_ppc_has_changed(pr, 0);
#endif
acpi_processor_get_throttling_info(pr);
acpi_processor_get_limit_info(pr);