Merge branch 'bugzilla-15064' into release (361243fd) · Commits · 戴 / test

drivers/acpi/processor_idle.c

+26 −38

Original line number	Diff line number	Diff line
		@@ -305,6 +305,28 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
		pr->power.states[ACPI_STATE_C2].latency = acpi_gbl_FADT.C2latency;
		pr->power.states[ACPI_STATE_C3].latency = acpi_gbl_FADT.C3latency;

		/*
		* FADT specified C2 latency must be less than or equal to
		* 100 microseconds.
		*/
		if (acpi_gbl_FADT.C2latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"C2 latency too large [%d]\n", acpi_gbl_FADT.C2latency));
		/* invalidate C2 */
		pr->power.states[ACPI_STATE_C2].address = 0;
		}

		/*
		* FADT supplied C3 latency must be less than or equal to
		* 1000 microseconds.
		*/
		if (acpi_gbl_FADT.C3latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"C3 latency too large [%d]\n", acpi_gbl_FADT.C3latency));
		/* invalidate C3 */
		pr->power.states[ACPI_STATE_C3].address = 0;
		}

		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"lvl2[0x%08x] lvl3[0x%08x]\n",
		pr->power.states[ACPI_STATE_C2].address,
		@@ -494,33 +516,6 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
		return status;
		}

		static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
		{

		if (!cx->address)
		return;

		/*
		* C2 latency must be less than or equal to 100
		* microseconds.
		*/
		else if (cx->latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"latency too large [%d]\n", cx->latency));
		return;
		}

		/*
		* Otherwise we've met all of our C2 requirements.
		* Normalize the C2 latency to expidite policy
		*/
		cx->valid = 1;

		cx->latency_ticks = cx->latency;

		return;
		}

		static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
		struct acpi_processor_cx *cx)
		{
		@@ -531,16 +526,6 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
		if (!cx->address)
		return;

		/*
		* C3 latency must be less than or equal to 1000
		* microseconds.
		*/
		else if (cx->latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"latency too large [%d]\n", cx->latency));
		return;
		}

		/*
		* PIIX4 Erratum #18: We don't support C3 when Type-F (fast)
		* DMA transfers are used by any ISA device to avoid livelock.
		@@ -629,7 +614,10 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
		break;

		case ACPI_STATE_C2:
		acpi_processor_power_verify_c2(cx);
		if (!cx->address)
		break;
		cx->valid = 1;
		cx->latency_ticks = cx->latency; /* Normalize latency */
		break;

		case ACPI_STATE_C3:

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