libata-acpi: register/unregister device to/from power resource

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index dd6d6a3..eb64087 100644 (file)
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -390,6 +390,7 @@ void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handl
                __acpi_power_resource_unregister_device(dev,
                        list->handles[i]);
 }
+EXPORT_SYMBOL_GPL(acpi_power_resource_unregister_device);
 
 static int __acpi_power_resource_register_device(
        struct acpi_power_managed_device *powered_device, acpi_handle handle)
@@ -460,6 +461,7 @@ no_power_resource:
        printk(KERN_WARNING PREFIX "Invalid Power Resource to register!");
        return -ENODEV;
 }
+EXPORT_SYMBOL_GPL(acpi_power_resource_register_device);
 
 /**
  * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index e01807a..f36284e 100644 (file)
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -1025,14 +1025,46 @@ static void ata_acpi_remove_pm_notifier(struct ata_device *dev)
        }
 }
 
+static void ata_acpi_register_power_resource(struct ata_device *dev)
+{
+       struct scsi_device *sdev = dev->sdev;
+       acpi_handle handle;
+       struct device *device;
+
+       handle = ata_dev_acpi_handle(dev);
+       if (!handle)
+               return;
+
+       device = &sdev->sdev_gendev;
+
+       acpi_power_resource_register_device(device, handle);
+}
+
+static void ata_acpi_unregister_power_resource(struct ata_device *dev)
+{
+       struct scsi_device *sdev = dev->sdev;
+       acpi_handle handle;
+       struct device *device;
+
+       handle = ata_dev_acpi_handle(dev);
+       if (!handle)
+               return;
+
+       device = &sdev->sdev_gendev;
+
+       acpi_power_resource_unregister_device(device, handle);
+}
+
 void ata_acpi_bind(struct ata_device *dev)
 {
        ata_acpi_add_pm_notifier(dev);
+       ata_acpi_register_power_resource(dev);
 }
 
 void ata_acpi_unbind(struct ata_device *dev)
 {
        ata_acpi_remove_pm_notifier(dev);
+       ata_acpi_unregister_power_resource(dev);
 }
 
 static int compat_pci_ata(struct ata_port *ap)