korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

ACPI: introduce helper function acpi_has_method()

Browse Source 
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>
This commit is contained in:
Jiang Liu 2013-06-29 00:24:38 +08:00 committed by Rafael J. Wysocki
parent 472d963bef
commit 952c63e951
9 changed files with 80 additions and 136 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/acpi/battery.c
View File

@ -548,12 +548,8 @@ static int acpi_battery_set_alarm(struct acpi_battery *battery)
static int acpi_battery_init_alarm(struct acpi_battery *battery)
{
acpi_status status = AE_OK;
acpi_handle handle = NULL;
/* See if alarms are supported, and if so, set default */
status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
if (ACPI_FAILURE(status)) {
if (!acpi_has_method(battery->device->handle, "_BTP")) {
clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
return 0;
}
@ -1066,7 +1062,7 @@ static int acpi_battery_add(struct acpi_device *device)
{
int result = 0;
struct acpi_battery *battery = NULL;
acpi_handle handle;
if (!device)
return -EINVAL;
battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
@ -1078,8 +1074,7 @@ static int acpi_battery_add(struct acpi_device *device)
device->driver_data = battery;
mutex_init(&battery->lock);
mutex_init(&battery->sysfs_lock);
if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
"_BIX", &handle)))
if (acpi_has_method(battery->device->handle, "_BIX"))
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
result = acpi_battery_update(battery);
if (result)

4
drivers/acpi/ec.c
View File

@ -1049,10 +1049,8 @@ int __init acpi_ec_ecdt_probe(void)
* which needs it, has fake EC._INI method, so use it as flag.
* Keep boot_ec struct as it will be needed soon.
*/
acpi_handle dummy;
if (!dmi_name_in_vendors("ASUS") ||
ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI",
&dummy)))
!acpi_has_method(boot_ec->handle, "_INI"))
return -ENODEV;
}
install:

22
drivers/acpi/processor_perflib.c
View File

@ -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");

4
drivers/acpi/resource.c
View File

@ -505,14 +505,12 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
void *preproc_data)
{
struct res_proc_context c;
acpi_handle not_used;
acpi_status status;
if (!adev || !adev->handle || !list_empty(list))
return -EINVAL;
status = acpi_get_handle(adev->handle, METHOD_NAME__CRS, &not_used);
if (ACPI_FAILURE(status))
if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
return 0;
c.list = list;

99
drivers/acpi/scan.c
View File

@ -193,7 +193,6 @@ static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl,
static int acpi_scan_hot_remove(struct acpi_device *device)
{
acpi_handle handle = device->handle;
acpi_handle not_used;
struct acpi_object_list arg_list;
union acpi_object arg;
struct device *errdev;
@ -258,7 +257,7 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
put_device(&device->dev);
device = NULL;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &not_used))) {
if (acpi_has_method(handle, "_LCK")) {
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
@ -652,7 +651,6 @@ static int acpi_device_setup_files(struct acpi_device *dev)
{
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
acpi_status status;
acpi_handle temp;
unsigned long long sun;
int result = 0;
@ -678,8 +676,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
/*
* If device has _STR, 'description' file is created
*/
status = acpi_get_handle(dev->handle, "_STR", &temp);
if (ACPI_SUCCESS(status)) {
if (acpi_has_method(dev->handle, "_STR")) {
status = acpi_evaluate_object(dev->handle, "_STR",
NULL, &buffer);
if (ACPI_FAILURE(status))
@ -709,8 +706,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
* If device has _EJ0, 'eject' file is created that is used to trigger
* hot-removal function from userland.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status)) {
if (acpi_has_method(dev->handle, "_EJ0")) {
result = device_create_file(&dev->dev, &dev_attr_eject);
if (result)
return result;
@ -732,9 +728,6 @@ end:
static void acpi_device_remove_files(struct acpi_device *dev)
{
acpi_status status;
acpi_handle temp;
if (dev->flags.power_manageable) {
device_remove_file(&dev->dev, &dev_attr_power_state);
if (dev->power.flags.power_resources)
@ -745,20 +738,17 @@ static void acpi_device_remove_files(struct acpi_device *dev)
/*
* If device has _STR, remove 'description' file
*/
status = acpi_get_handle(dev->handle, "_STR", &temp);
if (ACPI_SUCCESS(status)) {
if (acpi_has_method(dev->handle, "_STR")) {
kfree(dev->pnp.str_obj);
device_remove_file(&dev->dev, &dev_attr_description);
}
/*
* If device has _EJ0, remove 'eject' file.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
if (acpi_has_method(dev->handle, "_EJ0"))
device_remove_file(&dev->dev, &dev_attr_eject);
status = acpi_get_handle(dev->handle, "_SUN", &temp);
if (ACPI_SUCCESS(status))
if (acpi_has_method(dev->handle, "_SUN"))
device_remove_file(&dev->dev, &dev_attr_sun);
if (dev->pnp.unique_id)
@ -1334,13 +1324,10 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
acpi_handle temp;
acpi_status status = 0;
int err;
/* Presence of _PRW indicates wake capable */
status = acpi_get_handle(device->handle, "_PRW", &temp);
if (ACPI_FAILURE(status))
if (!acpi_has_method(device->handle, "_PRW"))
return;
err = acpi_bus_extract_wakeup_device_power_package(device->handle,
@ -1370,7 +1357,6 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
struct acpi_device_power_state *ps = &device->power.states[state];
char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' };
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
acpi_status status;
INIT_LIST_HEAD(&ps->resources);
@ -1393,8 +1379,7 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
/* Evaluate "_PSx" to see if we can do explicit sets */
pathname[2] = 'S';
status = acpi_get_handle(device->handle, pathname, &handle);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, pathname))
ps->flags.explicit_set = 1;
/*
@ -1413,28 +1398,21 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
static void acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
u32 i;
/* Presence of _PS0|_PR0 indicates 'power manageable' */
status = acpi_get_handle(device->handle, "_PS0", &handle);
if (ACPI_FAILURE(status)) {
status = acpi_get_handle(device->handle, "_PR0", &handle);
if (ACPI_FAILURE(status))
return;
}
if (!acpi_has_method(device->handle, "_PS0") &&
!acpi_has_method(device->handle, "_PR0"))
return;
device->flags.power_manageable = 1;
/*
* Power Management Flags
*/
status = acpi_get_handle(device->handle, "_PSC", &handle);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, "_PSC"))
device->power.flags.explicit_get = 1;
status = acpi_get_handle(device->handle, "_IRC", &handle);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, "_IRC"))
device->power.flags.inrush_current = 1;
/*
@ -1468,28 +1446,18 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
static void acpi_bus_get_flags(struct acpi_device *device)
{
acpi_status status = AE_OK;
acpi_handle temp = NULL;
/* Presence of _STA indicates 'dynamic_status' */
status = acpi_get_handle(device->handle, "_STA", &temp);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, "_STA"))
device->flags.dynamic_status = 1;
/* Presence of _RMV indicates 'removable' */
status = acpi_get_handle(device->handle, "_RMV", &temp);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, "_RMV"))
device->flags.removable = 1;
/* Presence of _EJD|_EJ0 indicates 'ejectable' */
status = acpi_get_handle(device->handle, "_EJD", &temp);
if (ACPI_SUCCESS(status))
if (acpi_has_method(device->handle, "_EJD") ||
acpi_has_method(device->handle, "_EJ0"))
device->flags.ejectable = 1;
else {
status = acpi_get_handle(device->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
device->flags.ejectable = 1;
}
}
static void acpi_device_get_busid(struct acpi_device *device)
@ -1538,27 +1506,24 @@ static void acpi_device_get_busid(struct acpi_device *device)
*/
static int acpi_bay_match(acpi_handle handle)
{
acpi_status status;
acpi_handle tmp;
acpi_handle phandle;
status = acpi_get_handle(handle, "_EJ0", &tmp);
if (ACPI_FAILURE(status))
if (!acpi_has_method(handle, "_EJ0"))
return -ENODEV;
if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
if (acpi_has_method(handle, "_GTF") ||
acpi_has_method(handle, "_GTM") ||
acpi_has_method(handle, "_STM") ||
acpi_has_method(handle, "_SDD"))
return 0;
if (acpi_get_parent(handle, &phandle))
return -ENODEV;
if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
(ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
if (acpi_has_method(phandle, "_GTF") ||
acpi_has_method(phandle, "_GTM") ||
acpi_has_method(phandle, "_STM") ||
acpi_has_method(phandle, "_SDD"))
return 0;
return -ENODEV;
@ -1610,7 +1575,6 @@ static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id)
*/
static int acpi_ibm_smbus_match(acpi_handle handle)
{
acpi_handle h_dummy;
struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
int result;
@ -1629,9 +1593,9 @@ static int acpi_ibm_smbus_match(acpi_handle handle)
/* Does it have the necessary (but misnamed) methods? */
result = -ENODEV;
if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) &&
ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) &&
ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy)))
if (acpi_has_method(handle, "SBI") &&
acpi_has_method(handle, "SBR") &&
acpi_has_method(handle, "SBW"))
result = 0;
out:
kfree(path.pointer);
@ -1898,7 +1862,6 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
struct acpi_device *device = NULL;
int type;
unsigned long long sta;
acpi_status status;
int result;
acpi_bus_get_device(handle, &device);
@ -1919,10 +1882,8 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
!(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
struct acpi_device_wakeup wakeup;
acpi_handle temp;
status = acpi_get_handle(handle, "_PRW", &temp);
if (ACPI_SUCCESS(status)) {
if (acpi_has_method(handle, "_PRW")) {
acpi_bus_extract_wakeup_device_power_package(handle,
&wakeup);
acpi_power_resources_list_free(&wakeup.resources);

15
drivers/acpi/utils.c
View File

@ -495,3 +495,18 @@ acpi_handle_printk(const char *level, acpi_handle handle, const char *fmt, ...)
kfree(buffer.pointer);
}
EXPORT_SYMBOL(acpi_handle_printk);
/**
* acpi_has_method: Check whether @handle has a method named @name
* @handle: ACPI device handle
* @name: name of object or method
*
* Check whether @handle has a method named @name.
*/
bool acpi_has_method(acpi_handle handle, char *name)
{
acpi_handle tmp;
return ACPI_SUCCESS(acpi_get_handle(handle, name, &tmp));
}
EXPORT_SYMBOL(acpi_has_method);

39
drivers/acpi/video.c
View File

@ -875,28 +875,21 @@ out:
static void acpi_video_device_find_cap(struct acpi_video_device *device)
{
acpi_handle h_dummy1;
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
if (acpi_has_method(device->dev->handle, "_ADR"))
device->cap._ADR = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
if (acpi_has_method(device->dev->handle, "_BCL"))
device->cap._BCL = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
if (acpi_has_method(device->dev->handle, "_BCM"))
device->cap._BCM = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
if (acpi_has_method(device->dev->handle, "_BQC")) {
device->cap._BQC = 1;
else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
&h_dummy1))) {
} else if (acpi_has_method(device->dev->handle, "_BCQ")) {
printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
device->cap._BCQ = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
if (acpi_has_method(device->dev->handle, "_DDC"))
device->cap._DDC = 1;
}
if (acpi_video_backlight_support()) {
struct backlight_properties props;
@ -984,26 +977,18 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
{
acpi_handle h_dummy1;
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_DOS"))
video->cap._DOS = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_DOD"))
video->cap._DOD = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_ROM"))
video->cap._ROM = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_GPD"))
video->cap._GPD = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_SPD"))
video->cap._SPD = 1;
}
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
if (acpi_has_method(video->device->handle, "_VPO"))
video->cap._VPO = 1;
}
}
/*

19
drivers/acpi/video_detect.c
View File

@ -51,14 +51,13 @@ acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
void **retyurn_value)
{
long *cap = context;
acpi_handle h_dummy;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_BCM", &h_dummy)) &&
ACPI_SUCCESS(acpi_get_handle(handle, "_BCL", &h_dummy))) {
if (acpi_has_method(handle, "_BCM") &&
acpi_has_method(handle, "_BCL")) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight "
"support\n"));
*cap |= ACPI_VIDEO_BACKLIGHT;
if (ACPI_FAILURE(acpi_get_handle(handle, "_BQC", &h_dummy)))
if (!acpi_has_method(handle, "_BQC"))
printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, "
"cannot determine initial brightness\n");
/* We have backlight support, no need to scan further */
@ -77,22 +76,20 @@ acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
*/
long acpi_is_video_device(acpi_handle handle)
{
acpi_handle h_dummy;
long video_caps = 0;
/* Is this device able to support video switching ? */
if (ACPI_SUCCESS(acpi_get_handle(handle, "_DOD", &h_dummy)) ||
ACPI_SUCCESS(acpi_get_handle(handle, "_DOS", &h_dummy)))
if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS"))
video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;
/* Is this device able to retrieve a video ROM ? */
if (ACPI_SUCCESS(acpi_get_handle(handle, "_ROM", &h_dummy)))
if (acpi_has_method(handle, "_ROM"))
video_caps |= ACPI_VIDEO_ROM_AVAILABLE;
/* Is this device able to configure which video head to be POSTed ? */
if (ACPI_SUCCESS(acpi_get_handle(handle, "_VPO", &h_dummy)) &&
ACPI_SUCCESS(acpi_get_handle(handle, "_GPD", &h_dummy)) &&
ACPI_SUCCESS(acpi_get_handle(handle, "_SPD", &h_dummy)))
if (acpi_has_method(handle, "_VPO") &&
acpi_has_method(handle, "_GPD") &&
acpi_has_method(handle, "_SPD"))
video_caps |= ACPI_VIDEO_DEVICE_POSTING;
/* Only check for backlight functionality if one of the above hit. */

3
include/acpi/acpi_bus.h
View File

@ -56,6 +56,9 @@ acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
bool acpi_has_method(acpi_handle handle, char *name);
#ifdef CONFIG_ACPI
#include <linux/proc_fs.h>