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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 d1676b1754d9..8f6da9acc8e4 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -305,6 +305,17 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
305 pr->power.states[ACPI_STATE_C2].latency = acpi_gbl_FADT.C2latency; 305 pr->power.states[ACPI_STATE_C2].latency = acpi_gbl_FADT.C2latency;
306 pr->power.states[ACPI_STATE_C3].latency = acpi_gbl_FADT.C3latency; 306 pr->power.states[ACPI_STATE_C3].latency = acpi_gbl_FADT.C3latency;
307 307
308 /*
309 * FADT specified C2 latency must be less than or equal to
310 * 100 microseconds.
311 */
312 if (acpi_gbl_FADT.C2latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
313 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
314 "C2 latency too large [%d]\n", acpi_gbl_FADT.C2latency));
315 /* invalidate C2 */
316 pr->power.states[ACPI_STATE_C2].address = 0;
317 }
318
308 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 319 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
309 "lvl2[0x%08x] lvl3[0x%08x]\n", 320 "lvl2[0x%08x] lvl3[0x%08x]\n",
310 pr->power.states[ACPI_STATE_C2].address, 321 pr->power.states[ACPI_STATE_C2].address,
@@ -501,16 +512,6 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
501 return; 512 return;
502 513
503 /* 514 /*
504 * C2 latency must be less than or equal to 100
505 * microseconds.
506 */
507 else if (cx->latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
508 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
509 "latency too large [%d]\n", cx->latency));
510 return;
511 }
512
513 /*
514 * Otherwise we've met all of our C2 requirements. 515 * Otherwise we've met all of our C2 requirements.
515 * Normalize the C2 latency to expidite policy 516 * Normalize the C2 latency to expidite policy
516 */ 517 */