+
+ err_out:
+ acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code,
+ NULL);
+ goto out;
+}
+
+static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
+{
+ struct acpi_device *device = NULL;
+ u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
+ int error;
+
+ mutex_lock(&acpi_scan_lock);
+
+ acpi_bus_get_device(handle, &device);
+ if (device) {
+ dev_warn(&device->dev, "Attempt to re-insert\n");
+ goto out;
+ }
+ acpi_evaluate_hotplug_ost(handle, ost_source,
+ ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
+ error = acpi_bus_scan(handle);
+ if (error) {
+ acpi_handle_warn(handle, "Namespace scan failure\n");
+ goto out;
+ }
+ error = acpi_bus_get_device(handle, &device);
+ if (error) {
+ acpi_handle_warn(handle, "Missing device node object\n");
+ goto out;
+ }
+ ost_code = ACPI_OST_SC_SUCCESS;
+ if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER)
+ kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
+
+ out:
+ acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL);
+ mutex_unlock(&acpi_scan_lock);
+}
+
+static void acpi_scan_bus_check(void *context)
+{
+ acpi_scan_bus_device_check((acpi_handle)context,
+ ACPI_NOTIFY_BUS_CHECK);
+}
+
+static void acpi_scan_device_check(void *context)
+{
+ acpi_scan_bus_device_check((acpi_handle)context,
+ ACPI_NOTIFY_DEVICE_CHECK);
+}
+
+static void acpi_hotplug_unsupported(acpi_handle handle, u32 type)
+{
+ u32 ost_status;
+
+ switch (type) {
+ case ACPI_NOTIFY_BUS_CHECK:
+ acpi_handle_debug(handle,
+ "ACPI_NOTIFY_BUS_CHECK event: unsupported\n");
+ ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED;
+ break;
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ acpi_handle_debug(handle,
+ "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n");
+ ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED;
+ break;
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ acpi_handle_debug(handle,
+ "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n");
+ ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
+ break;
+ default:
+ /* non-hotplug event; possibly handled by other handler */
+ return;
+ }
+
+ acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL);
+}
+
+static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
+{
+ acpi_osd_exec_callback callback;
+ struct acpi_scan_handler *handler = data;
+ acpi_status status;
+
+ if (!handler->hotplug.enabled)
+ return acpi_hotplug_unsupported(handle, type);
+
+ switch (type) {
+ case ACPI_NOTIFY_BUS_CHECK:
+ acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
+ callback = acpi_scan_bus_check;
+ break;
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
+ callback = acpi_scan_device_check;
+ break;
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
+ callback = acpi_bus_device_eject;
+ break;
+ default:
+ /* non-hotplug event; possibly handled by other handler */
+ return;
+ }
+ status = acpi_os_hotplug_execute(callback, handle);
+ if (ACPI_FAILURE(status))
+ acpi_evaluate_hotplug_ost(handle, type,
+ ACPI_OST_SC_NON_SPECIFIC_FAILURE,
+ NULL);
+}
+
+/**
+ * acpi_bus_hot_remove_device: hot-remove a device and its children
+ * @context: struct acpi_eject_event pointer (freed in this func)
+ *
+ * Hot-remove a device and its children. This function frees up the
+ * memory space passed by arg context, so that the caller may call
+ * this function asynchronously through acpi_os_hotplug_execute().
+ */
+void acpi_bus_hot_remove_device(void *context)
+{
+ struct acpi_eject_event *ej_event = context;
+ struct acpi_device *device = ej_event->device;
+ acpi_handle handle = device->handle;
+ int error;
+
+ mutex_lock(&acpi_scan_lock);
+
+ error = acpi_scan_hot_remove(device);
+ if (error && handle)
+ acpi_evaluate_hotplug_ost(handle, ej_event->event,
+ ACPI_OST_SC_NON_SPECIFIC_FAILURE,
+ NULL);
+
+ mutex_unlock(&acpi_scan_lock);
+ kfree(context);