9 files changed, 80 insertions, 136 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 082b4dd252a8..a7627166e18b 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -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)
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 80403c1a89f8..84bf06cec1f2 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -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:
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");
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 3322b47ab7ca..b7201fc6f1e1 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -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;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 10985573aaa7..ada0b4cf2ba5 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -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);
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 744371304313..b08d97376f84 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -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);
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5d7075d25700..a84533e67b9d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -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;
-        }
 }
 
 /*
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index e6bd910bc6ed..ddefa5f954e2 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -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. */
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 56e6b68c8d2f..62b2811bade4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -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>