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Commit 6a4e2b75 authored by Zhao Yakui's avatar Zhao Yakui Committed by Len Brown
Browse files

ACPI: Advertise to BIOS in _OSC: _OST on _PPC changes 



If the BIOS pokes the system-wide OSC bits to see if Linux
supports evaluating _OST after a _PPC change notification,
answer yes.

Also, fix an oversight where we neglected to set the OSC
bit advertising processor aggregator device support
when acpi-pad is compiled as a module.

Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 61c39bb3

drivers/acpi/bus.c

+6 −1
Original line number Diff line number Diff line
@@ -490,9 +490,14 @@ static void acpi_bus_osc_support(void) 


	capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;

	capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */

#ifdef CONFIG_ACPI_PROCESSOR_AGGREGATOR

#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\

			defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)

	capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;

#endif



#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)

	capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;

#endif

	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))

		return;

	if (ACPI_SUCCESS(acpi_run_osc(handle, &context)))