38 struct evdev {  struct
57 	struct evdev *evdev;  argument
215 	struct evdev *evdev = client->evdev;  in evdev_pass_values()  local
240 		wake_up_interruptible(&evdev->wait);  in evdev_pass_values()
249 	struct evdev *evdev = handle->private;  in evdev_events()  local
260 	client = rcu_dereference(evdev->grab);  in evdev_events()
265 		list_for_each_entry_rcu(client, &evdev->client_list, node)  in evdev_events()
292 	struct evdev *evdev = client->evdev;  in evdev_flush()  local
294 	mutex_lock(&evdev->mutex);  in evdev_flush()
296 	if (evdev->exist && !client->revoked)  in evdev_flush()
297 		input_flush_device(&evdev->handle, file);  in evdev_flush()
299 	mutex_unlock(&evdev->mutex);  in evdev_flush()
305 	struct evdev *evdev = container_of(dev, struct evdev, dev);  in evdev_free()  local
307 	input_put_device(evdev->handle.dev);  in evdev_free()
308 	kfree(evdev);  in evdev_free()
315 static int evdev_grab(struct evdev *evdev, struct evdev_client *client)  in evdev_grab()  argument
319 	if (evdev->grab)  in evdev_grab()
322 	error = input_grab_device(&evdev->handle);  in evdev_grab()
326 	rcu_assign_pointer(evdev->grab, client);  in evdev_grab()
331 static int evdev_ungrab(struct evdev *evdev, struct evdev_client *client)  in evdev_ungrab()  argument
333 	struct evdev_client *grab = rcu_dereference_protected(evdev->grab,  in evdev_ungrab()
334 					lockdep_is_held(&evdev->mutex));  in evdev_ungrab()
339 	rcu_assign_pointer(evdev->grab, NULL);  in evdev_ungrab()
341 	input_release_device(&evdev->handle);  in evdev_ungrab()
346 static void evdev_attach_client(struct evdev *evdev,  in evdev_attach_client()  argument
349 	spin_lock(&evdev->client_lock);  in evdev_attach_client()
350 	list_add_tail_rcu(&client->node, &evdev->client_list);  in evdev_attach_client()
351 	spin_unlock(&evdev->client_lock);  in evdev_attach_client()
354 static void evdev_detach_client(struct evdev *evdev,  in evdev_detach_client()  argument
357 	spin_lock(&evdev->client_lock);  in evdev_detach_client()
359 	spin_unlock(&evdev->client_lock);  in evdev_detach_client()
363 static int evdev_open_device(struct evdev *evdev)  in evdev_open_device()  argument
367 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_open_device()
371 	if (!evdev->exist)  in evdev_open_device()
373 	else if (!evdev->open++) {  in evdev_open_device()
374 		retval = input_open_device(&evdev->handle);  in evdev_open_device()
376 			evdev->open--;  in evdev_open_device()
379 	mutex_unlock(&evdev->mutex);  in evdev_open_device()
383 static void evdev_close_device(struct evdev *evdev)  in evdev_close_device()  argument
385 	mutex_lock(&evdev->mutex);  in evdev_close_device()
387 	if (evdev->exist && !--evdev->open)  in evdev_close_device()
388 		input_close_device(&evdev->handle);  in evdev_close_device()
390 	mutex_unlock(&evdev->mutex);  in evdev_close_device()
397 static void evdev_hangup(struct evdev *evdev)  in evdev_hangup()  argument
401 	spin_lock(&evdev->client_lock);  in evdev_hangup()
402 	list_for_each_entry(client, &evdev->client_list, node)  in evdev_hangup()
404 	spin_unlock(&evdev->client_lock);  in evdev_hangup()
406 	wake_up_interruptible(&evdev->wait);  in evdev_hangup()
412 	struct evdev *evdev = client->evdev;  in evdev_release()  local
414 	mutex_lock(&evdev->mutex);  in evdev_release()
415 	evdev_ungrab(evdev, client);  in evdev_release()
416 	mutex_unlock(&evdev->mutex);  in evdev_release()
418 	evdev_detach_client(evdev, client);  in evdev_release()
425 	evdev_close_device(evdev);  in evdev_release()
441 	struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev);  in evdev_open()  local
442 	unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev);  in evdev_open()
456 	client->evdev = evdev;  in evdev_open()
457 	evdev_attach_client(evdev, client);  in evdev_open()
459 	error = evdev_open_device(evdev);  in evdev_open()
469 	evdev_detach_client(evdev, client);  in evdev_open()
478 	struct evdev *evdev = client->evdev;  in evdev_write()  local
485 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_write()
489 	if (!evdev->exist || client->revoked) {  in evdev_write()
502 		input_inject_event(&evdev->handle,  in evdev_write()
507 	mutex_unlock(&evdev->mutex);  in evdev_write()
533 	struct evdev *evdev = client->evdev;  in evdev_read()  local
542 		if (!evdev->exist || client->revoked)  in evdev_read()
569 			error = wait_event_interruptible(evdev->wait,  in evdev_read()
571 					!evdev->exist || client->revoked);  in evdev_read()
584 	struct evdev *evdev = client->evdev;  in evdev_poll()  local
587 	poll_wait(file, &evdev->wait, wait);  in evdev_poll()
589 	if (evdev->exist && !client->revoked)  in evdev_poll()
844 static int evdev_revoke(struct evdev *evdev, struct evdev_client *client,  in evdev_revoke()  argument
848 	evdev_ungrab(evdev, client);  in evdev_revoke()
849 	input_flush_device(&evdev->handle, file);  in evdev_revoke()
850 	wake_up_interruptible(&evdev->wait);  in evdev_revoke()
859 	struct evdev *evdev = client->evdev;  in evdev_do_ioctl()  local
860 	struct input_dev *dev = evdev->handle.dev;  in evdev_do_ioctl()
896 		input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);  in evdev_do_ioctl()
897 		input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);  in evdev_do_ioctl()
913 			return evdev_grab(evdev, client);  in evdev_do_ioctl()
915 			return evdev_ungrab(evdev, client);  in evdev_do_ioctl()
921 			return evdev_revoke(evdev, client, file);  in evdev_do_ioctl()
1061 	struct evdev *evdev = client->evdev;  in evdev_ioctl_handler()  local
1064 	retval = mutex_lock_interruptible(&evdev->mutex);  in evdev_ioctl_handler()
1068 	if (!evdev->exist || client->revoked) {  in evdev_ioctl_handler()
1076 	mutex_unlock(&evdev->mutex);  in evdev_ioctl_handler()
1114 static void evdev_mark_dead(struct evdev *evdev)  in evdev_mark_dead()  argument
1116 	mutex_lock(&evdev->mutex);  in evdev_mark_dead()
1117 	evdev->exist = false;  in evdev_mark_dead()
1118 	mutex_unlock(&evdev->mutex);  in evdev_mark_dead()
1121 static void evdev_cleanup(struct evdev *evdev)  in evdev_cleanup()  argument
1123 	struct input_handle *handle = &evdev->handle;  in evdev_cleanup()
1125 	evdev_mark_dead(evdev);  in evdev_cleanup()
1126 	evdev_hangup(evdev);  in evdev_cleanup()
1128 	cdev_del(&evdev->cdev);  in evdev_cleanup()
1131 	if (evdev->open) {  in evdev_cleanup()
1144 	struct evdev *evdev;  in evdev_connect()  local
1156 	evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL);  in evdev_connect()
1157 	if (!evdev) {  in evdev_connect()
1162 	INIT_LIST_HEAD(&evdev->client_list);  in evdev_connect()
1163 	spin_lock_init(&evdev->client_lock);  in evdev_connect()
1164 	mutex_init(&evdev->mutex);  in evdev_connect()
1165 	init_waitqueue_head(&evdev->wait);  in evdev_connect()
1166 	evdev->exist = true;  in evdev_connect()
1172 	dev_set_name(&evdev->dev, "event%d", dev_no);  in evdev_connect()
1174 	evdev->handle.dev = input_get_device(dev);  in evdev_connect()
1175 	evdev->handle.name = dev_name(&evdev->dev);  in evdev_connect()
1176 	evdev->handle.handler = handler;  in evdev_connect()
1177 	evdev->handle.private = evdev;  in evdev_connect()
1179 	evdev->dev.devt = MKDEV(INPUT_MAJOR, minor);  in evdev_connect()
1180 	evdev->dev.class = &input_class;  in evdev_connect()
1181 	evdev->dev.parent = &dev->dev;  in evdev_connect()
1182 	evdev->dev.release = evdev_free;  in evdev_connect()
1183 	device_initialize(&evdev->dev);  in evdev_connect()
1185 	error = input_register_handle(&evdev->handle);  in evdev_connect()
1189 	cdev_init(&evdev->cdev, &evdev_fops);  in evdev_connect()
1190 	evdev->cdev.kobj.parent = &evdev->dev.kobj;  in evdev_connect()
1191 	error = cdev_add(&evdev->cdev, evdev->dev.devt, 1);  in evdev_connect()
1195 	error = device_add(&evdev->dev);  in evdev_connect()
1202 	evdev_cleanup(evdev);  in evdev_connect()
1204 	input_unregister_handle(&evdev->handle);  in evdev_connect()
1206 	put_device(&evdev->dev);  in evdev_connect()
1214 	struct evdev *evdev = handle->private;  in evdev_disconnect()  local
1216 	device_del(&evdev->dev);  in evdev_disconnect()
1217 	evdev_cleanup(evdev);  in evdev_disconnect()
1218 	input_free_minor(MINOR(evdev->dev.devt));  in evdev_disconnect()
1220 	put_device(&evdev->dev);  in evdev_disconnect()