1 files changed, 5 insertions, 59 deletions

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 59d3202f6b36..d42b2fb5a7e9 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -118,9 +118,10 @@ int acpi_device_get_power(struct acpi_device *device, int *state)
         /*
          * If we were unsure about the device parent's power state up to this
          * point, the fact that the device is in D0 implies that the parent has
-         * to be in D0 too.
+         * to be in D0 too, except if ignore_parent is set.
          */
-        if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
+        if (!device->power.flags.ignore_parent && device->parent
+            && device->parent->power.state == ACPI_STATE_UNKNOWN
             && result == ACPI_STATE_D0)
                 device->parent->power.state = ACPI_STATE_D0;
 
@@ -177,7 +178,8 @@ int acpi_device_set_power(struct acpi_device *device, int state)
                          acpi_power_state_string(state));
                 return -ENODEV;
         }
-        if (device->parent && (state < device->parent->power.state)) {
+        if (!device->power.flags.ignore_parent &&
+            device->parent && (state < device->parent->power.state)) {
                 dev_warn(&device->dev,
                          "Cannot transition to power state %s for parent in %s\n",
                          acpi_power_state_string(state),
@@ -1025,60 +1027,4 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off)
         }
 }
 EXPORT_SYMBOL_GPL(acpi_dev_pm_detach);
-
-/**
- * acpi_dev_pm_add_dependent - Add physical device depending for PM.
- * @handle: Handle of ACPI device node.
- * @depdev: Device depending on that node for PM.
- */
-void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev)
-{
-        struct acpi_device_physical_node *dep;
-        struct acpi_device *adev;
-
-        if (!depdev || acpi_bus_get_device(handle, &adev))
-                return;
-
-        mutex_lock(&adev->physical_node_lock);
-
-        list_for_each_entry(dep, &adev->power_dependent, node)
-                if (dep->dev == depdev)
-                        goto out;
-
-        dep = kzalloc(sizeof(*dep), GFP_KERNEL);
-        if (dep) {
-                dep->dev = depdev;
-                list_add_tail(&dep->node, &adev->power_dependent);
-        }
-
- out:
-        mutex_unlock(&adev->physical_node_lock);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_pm_add_dependent);
-
-/**
- * acpi_dev_pm_remove_dependent - Remove physical device depending for PM.
- * @handle: Handle of ACPI device node.
- * @depdev: Device depending on that node for PM.
- */
-void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev)
-{
-        struct acpi_device_physical_node *dep;
-        struct acpi_device *adev;
-
-        if (!depdev || acpi_bus_get_device(handle, &adev))
-                return;
-
-        mutex_lock(&adev->physical_node_lock);
-
-        list_for_each_entry(dep, &adev->power_dependent, node)
-                if (dep->dev == depdev) {
-                        list_del(&dep->node);
-                        kfree(dep);
-                        break;
-                }
-
-        mutex_unlock(&adev->physical_node_lock);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_pm_remove_dependent);
 #endif /* CONFIG_PM */