On Tue, Aug 19, 2025 at 4:28 AM shangsong <shangsong2@xxxxxxxxxxx> wrote:
>
> From: Shang song (Lenovo) <shangsong2@xxxxxxxxxx>
>
> If the handler_address or mapped VA is NULL, the related buffer
> address and VA can be ignored.
>
> Signed-off-by: Shang song <shangsong2@xxxxxxxxxx>
> ---
> drivers/acpi/prmt.c | 19 ++++++++++++++++---
> 1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c
> index be033bbb126a..3a501fcd78df 100644
> --- a/drivers/acpi/prmt.c
> +++ b/drivers/acpi/prmt.c
> @@ -150,15 +150,28 @@ acpi_parse_prmt(union acpi_subtable_headers *header, const unsigned long end)
> th = &tm->handlers[cur_handler];
>
> guid_copy(&th->guid, (guid_t *)handler_info->handler_guid);
> +
> + /*
> + * Print a error message if handler_address is NULL, the parse of VA also
> + * can be skipped.
> + */
> + if (unlikely(!handler_info->handler_address)) {
> + pr_err("Skipping handler with NULL address for GUID: %pUL",
> + (guid_t *)handler_info->handler_guid);
pr_info(), please.
> + continue;
> + }
> +
> th->handler_addr =
> (void *)efi_pa_va_lookup(&th->guid, handler_info->handler_address);
> /*
> - * Print a warning message if handler_addr is zero which is not expected to
> - * ever happen.
> + * Print a warning message and skip the parse of VA if handler_addr is zero
> + * which is not expected to ever happen.
> */
> - if (unlikely(!th->handler_addr))
> + if (unlikely(!th->handler_addr)) {
> pr_warn("Failed to find VA of handler for GUID: %pUL, PA: 0x%llx",
> &th->guid, handler_info->handler_address);
> + continue;
> + }
>
> th->static_data_buffer_addr =
> efi_pa_va_lookup(&th->guid, handler_info->static_data_buffer_address);
> --
