ACPI: quiet ACPI Exceptions due to no _PTC or _TSS
ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20070126] ACPI Exception (processor_throttling-0147): AE_NOT_FOUND, Evaluating _TSS [20070126] These methods are optional, so Linux should not alarm users when they are not found. http://bugzilla.kernel.org/show_bug.cgi?id=8802 Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Luming Yu <luming.yu@intel.com>
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@ -47,6 +47,9 @@ ACPI_MODULE_NAME("processor_throttling");
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static int acpi_processor_get_throttling(struct acpi_processor *pr);
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int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
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/*
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* _TPC - Throttling Present Capabilities
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*/
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static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
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{
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acpi_status status = 0;
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@ -55,8 +58,10 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
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if (!pr)
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return -EINVAL;
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status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
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}
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return -ENODEV;
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}
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pr->throttling_platform_limit = (int)tpc;
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@ -68,9 +73,9 @@ int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
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return acpi_processor_get_platform_limit(pr);
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}
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/* --------------------------------------------------------------------------
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_PTC, _TSS, _TSD support
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-------------------------------------------------------------------------- */
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/*
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* _PTC - Processor Throttling Control (and status) register location
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*/
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static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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{
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int result = 0;
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@ -81,7 +86,9 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
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if (status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
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}
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return -ENODEV;
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}
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@ -132,6 +139,10 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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return result;
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}
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/*
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* _TSS - Throttling Supported States
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*/
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static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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{
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int result = 0;
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@ -144,7 +155,9 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
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if (status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
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}
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return -ENODEV;
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}
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@ -201,6 +214,10 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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return result;
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}
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/*
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* _TSD - T-State Dependencies
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*/
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static int acpi_processor_get_tsd(struct acpi_processor *pr)
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{
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int result = 0;
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@ -213,6 +230,9 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
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status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSD"));
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}
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return -ENODEV;
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}
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@ -525,9 +545,6 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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int result = 0;
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int step = 0;
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int i = 0;
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int no_ptc = 0;
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int no_tss = 0;
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int no_tsd = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
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@ -538,12 +555,14 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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if (!pr)
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return -EINVAL;
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/* TBD: Support ACPI 2.0 objects */
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no_ptc = acpi_processor_get_throttling_control(pr);
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no_tss = acpi_processor_get_throttling_states(pr);
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no_tsd = acpi_processor_get_tsd(pr);
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if (no_ptc || no_tss) {
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/*
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* Evaluate _PTC, _TSS and _TPC
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* They must all be present or none of them can be used.
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*/
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if (acpi_processor_get_throttling_control(pr) ||
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acpi_processor_get_throttling_states(pr) ||
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acpi_processor_get_platform_limit(pr))
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{
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pr->throttling.acpi_processor_get_throttling =
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&acpi_processor_get_throttling_fadt;
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pr->throttling.acpi_processor_set_throttling =
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@ -555,6 +574,8 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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&acpi_processor_set_throttling_ptc;
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}
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acpi_processor_get_tsd(pr);
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if (!pr->throttling.address) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
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return 0;
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