On Mon, Nov 3, 2025 at 9:42 AM Huisong Li <lihuisong@huawei.com> wrote:
>
> The architecture specific context loss flags is important for ARM.
> And this flag is used to control the execution of different code
> flows in acpi_processor_ffh_lpi_enter().
>
> So mark the state as invalid when get lpi_state->arch_flags of this
> state failed.
>
> Fixes: a36a7fecfe60 ("ACPI / processor_idle: Add support for Low Power Idle(LPI) states")
> Signed-off-by: Huisong Li <lihuisong@huawei.com>
> ---
> drivers/acpi/processor_idle.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index 9f1040eac051..5213a545fa78 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -983,8 +983,12 @@ static int acpi_processor_evaluate_lpi(acpi_handle handle,
> if (obj_get_integer(pkg_elem + 2, &lpi_state->flags))
> lpi_state->flags = 0;
>
> - if (obj_get_integer(pkg_elem + 3, &lpi_state->arch_flags))
> - lpi_state->arch_flags = 0;
> + if (obj_get_integer(pkg_elem + 3, &lpi_state->arch_flags)) {
> + pr_err("Get state-%d architecture specific context loss flags failed, disable it.\n",
> + state_idx);
> + lpi_state->flags = 0;
> + continue;
This is ARM-specific behavior you want to put into generic code.
I'm not going to apply this.
> + }
>
> if (obj_get_integer(pkg_elem + 4, &lpi_state->res_cnt_freq))
> lpi_state->res_cnt_freq = 1;
> --
> 2.33.0
>