On 7/2/21 10:02 PM, Rafael J. Wysocki wrote: > On Fri, Jul 2, 2021 at 4:02 PM Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx> wrote: >> >> On 7/2/21 7:37 PM, Rafael J. Wysocki wrote: >>> On Fri, Jul 2, 2021 at 9:03 AM Aubrey Li <aubrey.li@xxxxxxxxx> wrote: >>>> >>>> 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 >>> >>> What about using if (IS_ENABLED()) instead of #ifdef? >> >> aha, sorry, using if (IS_ENABLED()) is better, will come up with a new version soon. > > No need (see my other reply). > > Thanks! > Okay, thanks Rafael!
