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Commit 0ac3c571 authored by Zhao Yakui's avatar Zhao Yakui Committed by Len Brown
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ACPI: Get throttling info from BIOS only after evaluating _PDC 



Previously _PDC was evaluated later, and thus we'd not get
the chance to tell the BIOS that we can suport FixedHW registers (MSRs)
and the BIOS would always ask us to use System I/O access
for throttling.

Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
Signed-off-by: default avatarLi Shaohua <shaohua.li@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 9bcb2721

drivers/acpi/processor_core.c

+6 −6
Original line number Diff line number Diff line
@@ -612,12 +612,6 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) 
		request_region(pr->throttling.address, 6, "ACPI CPU throttle");

	}



#ifdef CONFIG_CPU_FREQ

	acpi_processor_ppc_has_changed(pr);

#endif

	acpi_processor_get_throttling_info(pr);

	acpi_processor_get_limit_info(pr);



	return 0;

}
@@ -665,6 +659,12 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device) 
	/* _PDC call should be done before doing anything else (if reqd.). */

	arch_acpi_processor_init_pdc(pr);

	acpi_processor_set_pdc(pr);

#ifdef CONFIG_CPU_FREQ

	acpi_processor_ppc_has_changed(pr);

#endif

	acpi_processor_get_throttling_info(pr);

	acpi_processor_get_limit_info(pr);





	acpi_processor_power_init(pr, device);