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-rw-r--r--drivers/acpi/processor_idle.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 5f51057518b0..807b0df308f1 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -274,8 +274,6 @@ static void acpi_processor_idle(void)
}
}
- cx->usage++;
-
#ifdef CONFIG_HOTPLUG_CPU
/*
* Check for P_LVL2_UP flag before entering C2 and above on
@@ -283,9 +281,12 @@ static void acpi_processor_idle(void)
* detection phase, to work cleanly with logical CPU hotplug.
*/
if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
- !pr->flags.has_cst && acpi_fadt.plvl2_up)
- cx->type = ACPI_STATE_C1;
+ !pr->flags.has_cst && !acpi_fadt.plvl2_up)
+ cx = &pr->power.states[ACPI_STATE_C1];
#endif
+
+ cx->usage++;
+
/*
* Sleep:
* ------
@@ -386,6 +387,15 @@ static void acpi_processor_idle(void)
next_state = pr->power.state;
+#ifdef CONFIG_HOTPLUG_CPU
+ /* Don't do promotion/demotion */
+ if ((cx->type == ACPI_STATE_C1) && (num_online_cpus() > 1) &&
+ !pr->flags.has_cst && !acpi_fadt.plvl2_up) {
+ next_state = cx;
+ goto end;
+ }
+#endif
+
/*
* Promotion?
* ----------
@@ -557,7 +567,7 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
* Check for P_LVL2_UP flag before entering C2 and above on
* an SMP system.
*/
- if ((num_online_cpus() > 1) && acpi_fadt.plvl2_up)
+ if ((num_online_cpus() > 1) && !acpi_fadt.plvl2_up)
return_VALUE(-ENODEV);
#endif