94 static void joydev_pass_event(struct joydev_client *client,  in joydev_pass_event()  argument
97 	struct joydev *joydev = client->joydev;  in joydev_pass_event()
102 	spin_lock(&client->buffer_lock);  in joydev_pass_event()
104 	client->buffer[client->head] = *event;  in joydev_pass_event()
106 	if (client->startup == joydev->nabs + joydev->nkey) {  in joydev_pass_event()
107 		client->head++;  in joydev_pass_event()
108 		client->head &= JOYDEV_BUFFER_SIZE - 1;  in joydev_pass_event()
109 		if (client->tail == client->head)  in joydev_pass_event()
110 			client->startup = 0;  in joydev_pass_event()
113 	spin_unlock(&client->buffer_lock);  in joydev_pass_event()
115 	kill_fasync(&client->fasync, SIGIO, POLL_IN);  in joydev_pass_event()
122 	struct joydev_client *client;  in joydev_event()  local
152 	list_for_each_entry_rcu(client, &joydev->client_list, node)  in joydev_event()
153 		joydev_pass_event(client, &event);  in joydev_event()
161 	struct joydev_client *client = file->private_data;  in joydev_fasync()  local
163 	return fasync_helper(fd, file, on, &client->fasync);  in joydev_fasync()
175 				 struct joydev_client *client)  in joydev_attach_client()  argument
178 	list_add_tail_rcu(&client->node, &joydev->client_list);  in joydev_attach_client()
183 				 struct joydev_client *client)  in joydev_detach_client()  argument
186 	list_del_rcu(&client->node);  in joydev_detach_client()
227 	struct joydev_client *client;  in joydev_hangup()  local
230 	list_for_each_entry(client, &joydev->client_list, node)  in joydev_hangup()
231 		kill_fasync(&client->fasync, SIGIO, POLL_HUP);  in joydev_hangup()
239 	struct joydev_client *client = file->private_data;  in joydev_release()  local
240 	struct joydev *joydev = client->joydev;  in joydev_release()
242 	joydev_detach_client(joydev, client);  in joydev_release()
243 	kfree(client);  in joydev_release()
254 	struct joydev_client *client;  in joydev_open()  local
257 	client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);  in joydev_open()
258 	if (!client)  in joydev_open()
261 	spin_lock_init(&client->buffer_lock);  in joydev_open()
262 	client->joydev = joydev;  in joydev_open()
263 	joydev_attach_client(joydev, client);  in joydev_open()
269 	file->private_data = client;  in joydev_open()
275 	joydev_detach_client(joydev, client);  in joydev_open()
276 	kfree(client);  in joydev_open()
280 static int joydev_generate_startup_event(struct joydev_client *client,  in joydev_generate_startup_event()  argument
284 	struct joydev *joydev = client->joydev;  in joydev_generate_startup_event()
287 	spin_lock_irq(&client->buffer_lock);  in joydev_generate_startup_event()
289 	have_event = client->startup < joydev->nabs + joydev->nkey;  in joydev_generate_startup_event()
294 		if (client->startup < joydev->nkey) {  in joydev_generate_startup_event()
296 			event->number = client->startup;  in joydev_generate_startup_event()
301 			event->number = client->startup - joydev->nkey;  in joydev_generate_startup_event()
304 		client->startup++;  in joydev_generate_startup_event()
307 	spin_unlock_irq(&client->buffer_lock);  in joydev_generate_startup_event()
312 static int joydev_fetch_next_event(struct joydev_client *client,  in joydev_fetch_next_event()  argument
317 	spin_lock_irq(&client->buffer_lock);  in joydev_fetch_next_event()
319 	have_event = client->head != client->tail;  in joydev_fetch_next_event()
321 		*event = client->buffer[client->tail++];  in joydev_fetch_next_event()
322 		client->tail &= JOYDEV_BUFFER_SIZE - 1;  in joydev_fetch_next_event()
325 	spin_unlock_irq(&client->buffer_lock);  in joydev_fetch_next_event()
333 static ssize_t joydev_0x_read(struct joydev_client *client,  in joydev_0x_read()  argument
337 	struct joydev *joydev = client->joydev;  in joydev_0x_read()
355 	spin_lock(&client->buffer_lock);  in joydev_0x_read()
356 	client->startup = 0;  in joydev_0x_read()
357 	client->tail = client->head;  in joydev_0x_read()
358 	spin_unlock(&client->buffer_lock);  in joydev_0x_read()
368 static inline int joydev_data_pending(struct joydev_client *client)  in joydev_data_pending()  argument
370 	struct joydev *joydev = client->joydev;  in joydev_data_pending()
372 	return client->startup < joydev->nabs + joydev->nkey ||  in joydev_data_pending()
373 		client->head != client->tail;  in joydev_data_pending()
379 	struct joydev_client *client = file->private_data;  in joydev_read()  local
380 	struct joydev *joydev = client->joydev;  in joydev_read()
392 		return joydev_0x_read(client, input, buf);  in joydev_read()
394 	if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))  in joydev_read()
398 			!joydev->exist || joydev_data_pending(client));  in joydev_read()
406 	       joydev_generate_startup_event(client, input, &event)) {  in joydev_read()
415 	       joydev_fetch_next_event(client, &event)) {  in joydev_read()
429 	struct joydev_client *client = file->private_data;  in joydev_poll()  local
430 	struct joydev *joydev = client->joydev;  in joydev_poll()
433 	return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |  in joydev_poll()
588 	struct joydev_client *client = file->private_data;  in joydev_compat_ioctl()  local
589 	struct joydev *joydev = client->joydev;  in joydev_compat_ioctl()
655 	struct joydev_client *client = file->private_data;  in joydev_ioctl()  local
656 	struct joydev *joydev = client->joydev;  in joydev_ioctl()