diff options
| author | Jiang Liu <jiang.liu@huawei.com> | 2013-06-29 00:24:38 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-15 01:33:10 +0200 |
| commit | 952c63e9512b63220886105cfc791507046fa39a (patch) | |
| tree | bf3bd0592ea0fac74418fe16b8a4125e2db799ea /drivers/acpi/processor_perflib.c | |
| parent | 472d963befe28b8614ea2789757b27536c8d79eb (diff) | |
ACPI: introduce helper function acpi_has_method()
Introduce helper function acpi_has_method() and use it in a number
of places to simplify code.
[rjw: Changelog]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/processor_perflib.c')
| -rw-r--r-- | drivers/acpi/processor_perflib.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 1e9732d809bf..51d7948611da 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -164,17 +164,12 @@ static void acpi_processor_ppc_ost(acpi_handle handle, int status) {.type = ACPI_TYPE_INTEGER,}, }; struct acpi_object_list arg_list = {2, params}; - acpi_handle temp; - params[0].integer.value = ACPI_PROCESSOR_NOTIFY_PERFORMANCE; - params[1].integer.value = status; - - /* when there is no _OST , skip it */ - if (ACPI_FAILURE(acpi_get_handle(handle, "_OST", &temp))) - return; - - acpi_evaluate_object(handle, "_OST", &arg_list, NULL); - return; + if (acpi_has_method(handle, "_OST")) { + params[0].integer.value = ACPI_PROCESSOR_NOTIFY_PERFORMANCE; + params[1].integer.value = status; + acpi_evaluate_object(handle, "_OST", &arg_list, NULL); + } } int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag) @@ -468,14 +463,11 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr) int acpi_processor_get_performance_info(struct acpi_processor *pr) { int result = 0; - acpi_status status = AE_OK; - acpi_handle handle = NULL; if (!pr || !pr->performance || !pr->handle) return -EINVAL; - status = acpi_get_handle(pr->handle, "_PCT", &handle); - if (ACPI_FAILURE(status)) { + if (!acpi_has_method(pr->handle, "_PCT")) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI-based processor performance control unavailable\n")); return -ENODEV; @@ -501,7 +493,7 @@ int acpi_processor_get_performance_info(struct acpi_processor *pr) */ update_bios: #ifdef CONFIG_X86 - if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){ + if (acpi_has_method(pr->handle, "_PPC")) { if(boot_cpu_has(X86_FEATURE_EST)) printk(KERN_WARNING FW_BUG "BIOS needs update for CPU " "frequency support\n"); |