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-rw-r--r--drivers/acpi/processor_idle.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 8f6da9acc8e..2c543b42eb1 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -316,6 +316,17 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
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,
@@ -533,16 +544,6 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
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.
* Note that we could disable Type-F DMA (as recommended by