CPC_SUP_BUFFER_ONLY ensures that an expected BUFFER only register has a register type of ACPI_TYPE_BUFFER and is not NULL. Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@xxxxxxx> --- drivers/acpi/cppc_acpi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index d4244e7d0e38..56a09e057c4f 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -115,6 +115,14 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr); #define CPC_SUPPORTED(cpc) ((cpc)->type == ACPI_TYPE_INTEGER ? \ !!(cpc)->cpc_entry.int_value : \ !IS_NULL_REG(&(cpc)->cpc_entry.reg)) + +/* + * Evaluates to True if an optional cpc field is supported and is + * BUFFER only + */ +#define CPC_SUP_BUFFER_ONLY(cpc) ((cpc)->type == ACPI_TYPE_BUFFER && \ + !IS_NULL_REG(&(cpc)->cpc_entry.reg)) + /* * Arbitrary Retries in case the remote processor is slow to respond * to PCC commands. Keeping it high enough to cover emulators where -- 2.17.1
