diff options
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index ee5facccbe10..4482cf28f56a 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1143,7 +1143,7 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr) return 0; } -int __weak acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) +int __weak __cpuidle acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) { return -ENODEV; } @@ -1156,7 +1156,7 @@ int __weak acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) * * Return: 0 for success or negative value for error */ -static int acpi_idle_lpi_enter(struct cpuidle_device *dev, +static int __cpuidle acpi_idle_lpi_enter(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { struct acpi_processor *pr; @@ -1355,6 +1355,15 @@ void acpi_processor_register_idle_driver(void) int ret = -ENODEV; int cpu; + /* + * If a cpuidle driver is already registered, there is no need to + * evaluate _CST or attempt to register the ACPI idle driver. + */ + if (cpuidle_get_driver()) { + pr_debug("cpuidle driver %pS already registered.\n", cpuidle_get_driver()); + return; + } + acpi_processor_update_max_cstate(); /* |