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path: root/drivers/acpi/device_pm.c
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Diffstat (limited to 'drivers/acpi/device_pm.c')
-rw-r--r--drivers/acpi/device_pm.c56
1 files changed, 0 insertions, 56 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 59d3202f6b36..a94383d1f350 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1025,60 +1025,4 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off)
1025 } 1025 }
1026} 1026}
1027EXPORT_SYMBOL_GPL(acpi_dev_pm_detach); 1027EXPORT_SYMBOL_GPL(acpi_dev_pm_detach);
1028
1029/**
1030 * acpi_dev_pm_add_dependent - Add physical device depending for PM.
1031 * @handle: Handle of ACPI device node.
1032 * @depdev: Device depending on that node for PM.
1033 */
1034void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev)
1035{
1036 struct acpi_device_physical_node *dep;
1037 struct acpi_device *adev;
1038
1039 if (!depdev || acpi_bus_get_device(handle, &adev))
1040 return;
1041
1042 mutex_lock(&adev->physical_node_lock);
1043
1044 list_for_each_entry(dep, &adev->power_dependent, node)
1045 if (dep->dev == depdev)
1046 goto out;
1047
1048 dep = kzalloc(sizeof(*dep), GFP_KERNEL);
1049 if (dep) {
1050 dep->dev = depdev;
1051 list_add_tail(&dep->node, &adev->power_dependent);
1052 }
1053
1054 out:
1055 mutex_unlock(&adev->physical_node_lock);
1056}
1057EXPORT_SYMBOL_GPL(acpi_dev_pm_add_dependent);
1058
1059/**
1060 * acpi_dev_pm_remove_dependent - Remove physical device depending for PM.
1061 * @handle: Handle of ACPI device node.
1062 * @depdev: Device depending on that node for PM.
1063 */
1064void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev)
1065{
1066 struct acpi_device_physical_node *dep;
1067 struct acpi_device *adev;
1068
1069 if (!depdev || acpi_bus_get_device(handle, &adev))
1070 return;
1071
1072 mutex_lock(&adev->physical_node_lock);
1073
1074 list_for_each_entry(dep, &adev->power_dependent, node)
1075 if (dep->dev == depdev) {
1076 list_del(&dep->node);
1077 kfree(dep);
1078 break;
1079 }
1080
1081 mutex_unlock(&adev->physical_node_lock);
1082}
1083EXPORT_SYMBOL_GPL(acpi_dev_pm_remove_dependent);
1084#endif /* CONFIG_PM */ 1028#endif /* CONFIG_PM */