ACPI: add acpi_bus_removal_type in acpi_device

Add removal_type in structure acpi_device for hot removal.

ACPI_BUS_REMOVAL_EJECT is used for ACPI device hot removal.
Only one parameter is allowed in .remove method due to driver model.
So removal_type is added to indicate different removal type.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/scan.c

@@ -229,9 +229,9 @@ static int acpi_device_remove(struct device * dev)
 
 	if (acpi_drv) {
 		if (acpi_drv->ops.stop)
-			acpi_drv->ops.stop(acpi_dev, ACPI_BUS_REMOVAL_NORMAL);
+			acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type);
 		if (acpi_drv->ops.remove)
-			acpi_drv->ops.remove(acpi_dev, ACPI_BUS_REMOVAL_NORMAL);
+			acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
 	}
 	acpi_dev->driver = NULL;
 	acpi_driver_data(dev) = NULL;
@@ -294,6 +294,7 @@ static void acpi_device_register(struct acpi_device *device,
 	device_add(&device->dev);
 
 	acpi_device_setup_files(device);
+	device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
 }
 
 static void acpi_device_unregister(struct acpi_device *device, int type)
@@ -859,6 +860,7 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 	if (!dev)
 		return -EINVAL;
 
+	dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
 	device_release_driver(&dev->dev);
 
 	if (!rmdevice)

include/acpi/acpi_bus.h

@@ -301,6 +301,7 @@ struct acpi_device {
 	void *driver_data;
 	struct device dev;
 	struct acpi_bus_ops bus_ops;	/* workaround for different code path for hotplug */
+	enum acpi_bus_removal_type removal_type; /* indicate for different removal type */
 };
 
 #define acpi_driver_data(d)	((d)->driver_data)