On Wed, Sep 8, 2021 at 1:00 PM Aubrey Li <aubrey.li@xxxxxxxxx> wrote:
>
> Find and verify PRMT table before parse it, this eliminates a
> warning on machines without PRMT table.
>
> [ 7.197173] ACPI: PRMT not present
>
> Fixes: cefc7ca46235 ("ACPI: PRM: implement OperationRegion handler for the PlatformRtMechanism subtype")
> Signed-off-by: Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx>
> Tested-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
> ---
> drivers/acpi/prmt.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c
> index 1f6007a..89c22bc 100644
> --- a/drivers/acpi/prmt.c
> +++ b/drivers/acpi/prmt.c
> @@ -288,10 +288,18 @@ static acpi_status acpi_platformrt_space_handler(u32 function,
>
> void __init init_prmt(void)
> {
> + struct acpi_table_header *tbl;
> acpi_status status;
> - int mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) +
> + int mc;
> +
> + status = acpi_get_table(ACPI_SIG_PRMT, 0, &tbl);
> + if (ACPI_FAILURE(status))
> + return;
> +
> + mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) +
> sizeof (struct acpi_table_prmt_header),
> 0, acpi_parse_prmt, 0);
> + acpi_put_table(tbl);
> /*
> * Return immediately if PRMT table is not present or no PRM module found.
> */
> --
Applied as 5.15-rc material with some edits in the subject and
changelog, thanks!
