Based on _OSC PRM bit, BIOS can choose switch from legacy handling to using PRM. So if CONFIG_ACPI_PRMT is disabled, this bit should not be set to let BIOS fall back to the legacy handling (such as SMI). Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx> --- drivers/acpi/bus.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 60fb6a84..30a3d4a 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -303,7 +303,9 @@ static void acpi_bus_osc_negotiate_platform_control(void) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; +#ifdef CONFIG_ACPI_PRMT capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT; +#endif #ifdef CONFIG_ARM64 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; -- 2.7.4
