On Wednesday, April 22, 2020 9:26:07 AM CEST Zhang Rui wrote:
> It is possible for ACPI _CST to return only one ACPI C-state, for
> example, when deep cstate disabled in the BIOS.
> And it is better for the acpi_idle driver to probe in this case as well
> for consistency.
>
> Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> ---
> drivers/acpi/processor_idle.c | 9 ++-------
> 1 file changed, 2 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index dcc289e30166..75534c5b5433 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -308,11 +308,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
> if (ret)
> return ret;
>
> - /*
> - * It is expected that there will be at least 2 states, C1 and
> - * something else (C2 or C3), so fail if that is not the case.
> - */
> - if (pr->power.count < 2)
> + if (!pr->power.count)
> return -EFAULT;
>
> pr->flags.has_cst = 1;
> @@ -468,8 +464,7 @@ static int acpi_processor_get_cstate_info(struct acpi_processor *pr)
> for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
> if (pr->power.states[i].valid) {
> pr->power.count = i;
> - if (pr->power.states[i].type >= ACPI_STATE_C2)
> - pr->flags.power = 1;
> + pr->flags.power = 1;
> }
> }
>
>
Applied as 5.8-candidate material, thanks!
