38 struct evdev {  struct
57 	struct evdev *evdev;  argument
265 	struct evdev *evdev = client->evdev;  in evdev_pass_values()  local
302 		wake_up_interruptible(&evdev->wait);  in evdev_pass_values()
311 	struct evdev *evdev = handle->private;  in evdev_events()  local
322 	client = rcu_dereference(evdev->grab);  in evdev_events()
327 		list_for_each_entry_rcu(client, &evdev->client_list, node)  in evdev_events()
354 	struct evdev *evdev = client->evdev;  in evdev_flush()  local
356 	mutex_lock(&evdev->mutex);  in evdev_flush()
358 	if (evdev->exist && !client->revoked)  in evdev_flush()
359 		input_flush_device(&evdev->handle, file);  in evdev_flush()
361 	mutex_unlock(&evdev->mutex);  in evdev_flush()
367 	struct evdev *evdev = container_of(dev, struct evdev, dev);  in evdev_free()  local
369 	input_put_device(evdev->handle.dev);  in evdev_free()
370 	kfree(evdev);  in evdev_free()
377 static int evdev_grab(struct evdev *evdev, struct evdev_client *client)  in evdev_grab()  argument
381 	if (evdev->grab)  in evdev_grab()
384 	error = input_grab_device(&evdev->handle);  in evdev_grab()
388 	rcu_assign_pointer(evdev->grab, client);  in evdev_grab()
393 static int evdev_ungrab(struct evdev *evdev, struct evdev_client *client)  in evdev_ungrab()  argument
395 	struct evdev_client *grab = rcu_dereference_protected(evdev->grab,  in evdev_ungrab()
396 					lockdep_is_held(&evdev->mutex));  in evdev_ungrab()
401 	rcu_assign_pointer(evdev->grab, NULL);  in evdev_ungrab()
403 	input_release_device(&evdev->handle);  in evdev_ungrab()
408 static void evdev_attach_client(struct evdev *evdev,  in evdev_attach_client()  argument
411 	spin_lock(&evdev->client_lock);  in evdev_attach_client()
412 	list_add_tail_rcu(&client->node, &evdev->client_list);  in evdev_attach_client()
413 	spin_unlock(&evdev->client_lock);  in evdev_attach_client()
416 static void evdev_detach_client(struct evdev *evdev,  in evdev_detach_client()  argument
419 	spin_lock(&evdev->client_lock);  in evdev_detach_client()
421 	spin_unlock(&evdev->client_lock);  in evdev_detach_client()
425 static int evdev_open_device(struct evdev *evdev)  in evdev_open_device()  argument
429 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_open_device()
433 	if (!evdev->exist)  in evdev_open_device()
435 	else if (!evdev->open++) {  in evdev_open_device()
436 		retval = input_open_device(&evdev->handle);  in evdev_open_device()
438 			evdev->open--;  in evdev_open_device()
441 	mutex_unlock(&evdev->mutex);  in evdev_open_device()
445 static void evdev_close_device(struct evdev *evdev)  in evdev_close_device()  argument
447 	mutex_lock(&evdev->mutex);  in evdev_close_device()
449 	if (evdev->exist && !--evdev->open)  in evdev_close_device()
450 		input_close_device(&evdev->handle);  in evdev_close_device()
452 	mutex_unlock(&evdev->mutex);  in evdev_close_device()
459 static void evdev_hangup(struct evdev *evdev)  in evdev_hangup()  argument
463 	spin_lock(&evdev->client_lock);  in evdev_hangup()
464 	list_for_each_entry(client, &evdev->client_list, node)  in evdev_hangup()
466 	spin_unlock(&evdev->client_lock);  in evdev_hangup()
468 	wake_up_interruptible(&evdev->wait);  in evdev_hangup()
474 	struct evdev *evdev = client->evdev;  in evdev_release()  local
477 	mutex_lock(&evdev->mutex);  in evdev_release()
478 	evdev_ungrab(evdev, client);  in evdev_release()
479 	mutex_unlock(&evdev->mutex);  in evdev_release()
481 	evdev_detach_client(evdev, client);  in evdev_release()
488 	evdev_close_device(evdev);  in evdev_release()
504 	struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev);  in evdev_open()  local
505 	unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev);  in evdev_open()
519 	client->evdev = evdev;  in evdev_open()
520 	evdev_attach_client(evdev, client);  in evdev_open()
522 	error = evdev_open_device(evdev);  in evdev_open()
532 	evdev_detach_client(evdev, client);  in evdev_open()
541 	struct evdev *evdev = client->evdev;  in evdev_write()  local
548 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_write()
552 	if (!evdev->exist || client->revoked) {  in evdev_write()
565 		input_inject_event(&evdev->handle,  in evdev_write()
571 	mutex_unlock(&evdev->mutex);  in evdev_write()
597 	struct evdev *evdev = client->evdev;  in evdev_read()  local
606 		if (!evdev->exist || client->revoked)  in evdev_read()
633 			error = wait_event_interruptible(evdev->wait,  in evdev_read()
635 					!evdev->exist || client->revoked);  in evdev_read()
648 	struct evdev *evdev = client->evdev;  in evdev_poll()  local
651 	poll_wait(file, &evdev->wait, wait);  in evdev_poll()
653 	if (evdev->exist && !client->revoked)  in evdev_poll()
978 static int evdev_revoke(struct evdev *evdev, struct evdev_client *client,  in evdev_revoke()  argument
982 	evdev_ungrab(evdev, client);  in evdev_revoke()
983 	input_flush_device(&evdev->handle, file);  in evdev_revoke()
984 	wake_up_interruptible(&evdev->wait);  in evdev_revoke()
1068 	struct evdev *evdev = client->evdev;  in evdev_do_ioctl()  local
1069 	struct input_dev *dev = evdev->handle.dev;  in evdev_do_ioctl()
1106 		input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);  in evdev_do_ioctl()
1107 		input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);  in evdev_do_ioctl()
1123 			return evdev_grab(evdev, client);  in evdev_do_ioctl()
1125 			return evdev_ungrab(evdev, client);  in evdev_do_ioctl()
1131 			return evdev_revoke(evdev, client, file);  in evdev_do_ioctl()
1295 	struct evdev *evdev = client->evdev;  in evdev_ioctl_handler()  local
1298 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_ioctl_handler()
1302 	if (!evdev->exist || client->revoked) {  in evdev_ioctl_handler()
1310 	mutex_unlock(&evdev->mutex);  in evdev_ioctl_handler()
1348 static void evdev_mark_dead(struct evdev *evdev)  in evdev_mark_dead()  argument
1350 	mutex_lock(&evdev->mutex);  in evdev_mark_dead()
1351 	evdev->exist = false;  in evdev_mark_dead()
1352 	mutex_unlock(&evdev->mutex);  in evdev_mark_dead()
1355 static void evdev_cleanup(struct evdev *evdev)  in evdev_cleanup()  argument
1357 	struct input_handle *handle = &evdev->handle;  in evdev_cleanup()
1359 	evdev_mark_dead(evdev);  in evdev_cleanup()
1360 	evdev_hangup(evdev);  in evdev_cleanup()
1363 	if (evdev->open) {  in evdev_cleanup()
1376 	struct evdev *evdev;  in evdev_connect()  local
1388 	evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL);  in evdev_connect()
1389 	if (!evdev) {  in evdev_connect()
1394 	INIT_LIST_HEAD(&evdev->client_list);  in evdev_connect()
1395 	spin_lock_init(&evdev->client_lock);  in evdev_connect()
1396 	mutex_init(&evdev->mutex);  in evdev_connect()
1397 	init_waitqueue_head(&evdev->wait);  in evdev_connect()
1398 	evdev->exist = true;  in evdev_connect()
1404 	dev_set_name(&evdev->dev, "event%d", dev_no);  in evdev_connect()
1406 	evdev->handle.dev = input_get_device(dev);  in evdev_connect()
1407 	evdev->handle.name = dev_name(&evdev->dev);  in evdev_connect()
1408 	evdev->handle.handler = handler;  in evdev_connect()
1409 	evdev->handle.private = evdev;  in evdev_connect()
1411 	evdev->dev.devt = MKDEV(INPUT_MAJOR, minor);  in evdev_connect()
1412 	evdev->dev.class = &input_class;  in evdev_connect()
1413 	evdev->dev.parent = &dev->dev;  in evdev_connect()
1414 	evdev->dev.release = evdev_free;  in evdev_connect()
1415 	device_initialize(&evdev->dev);  in evdev_connect()
1417 	error = input_register_handle(&evdev->handle);  in evdev_connect()
1421 	cdev_init(&evdev->cdev, &evdev_fops);  in evdev_connect()
1423 	error = cdev_device_add(&evdev->cdev, &evdev->dev);  in evdev_connect()
1430 	evdev_cleanup(evdev);  in evdev_connect()
1431 	input_unregister_handle(&evdev->handle);  in evdev_connect()
1433 	put_device(&evdev->dev);  in evdev_connect()
1441 	struct evdev *evdev = handle->private;  in evdev_disconnect()  local
1443 	cdev_device_del(&evdev->cdev, &evdev->dev);  in evdev_disconnect()
1444 	evdev_cleanup(evdev);  in evdev_disconnect()
1445 	input_free_minor(MINOR(evdev->dev.devt));  in evdev_disconnect()
1447 	put_device(&evdev->dev);  in evdev_disconnect()