staging/greybus/raw.c

56  * Add the raw data message to the list of received messages.
58 static int receive_data(struct gb_raw *raw, u32 len, u8 *data)
61 	struct device *dev = &raw->connection->bundle->dev;
69 	mutex_lock(&raw->list_lock);
70 	if ((raw->list_data + len) > MAX_DATA_SIZE) {
82 	raw->list_data += len;
86 	list_add_tail(&raw_data->entry, &raw->list);
88 	mutex_unlock(&raw->list_lock);
96 	struct gb_raw *raw = greybus_get_drvdata(connection->bundle);
107 		dev_err(dev, "raw receive request too small (%zu < %zu)\n",
114 		dev_err(dev, "raw receive request wrong size %d vs %d\n", len,
119 		dev_err(dev, "raw receive request of 0 bytes?\n");
123 	return receive_data(raw, len, receive->data);
126 static int gb_raw_send(struct gb_raw *raw, u32 len, const char __user *data)
128 	struct gb_connection *connection = raw->connection;
156 	struct gb_raw *raw;
167 	raw = kzalloc(sizeof(*raw), GFP_KERNEL);
168 	if (!raw)
178 	INIT_LIST_HEAD(&raw->list);
179 	mutex_init(&raw->list_lock);
181 	raw->connection = connection;
182 	greybus_set_drvdata(bundle, raw);
190 	raw->dev = MKDEV(raw_major, minor);
191 	cdev_init(&raw->cdev, &raw_fops);
197 	retval = cdev_add(&raw->cdev, raw->dev, 1);
201 	raw->device = device_create(&raw_class, &connection->bundle->dev,
202 				    raw->dev, raw, "gb!raw%d", minor);
203 	if (IS_ERR(raw->device)) {
204 		retval = PTR_ERR(raw->device);
211 	cdev_del(&raw->cdev);
223 	kfree(raw);
229 	struct gb_raw *raw = greybus_get_drvdata(bundle);
230 	struct gb_connection *connection = raw->connection;
235 	device_destroy(&raw_class, raw->dev);
236 	cdev_del(&raw->cdev);
238 	ida_free(&minors, MINOR(raw->dev));
241 	mutex_lock(&raw->list_lock);
242 	list_for_each_entry_safe(raw_data, temp, &raw->list, entry) {
246 	mutex_unlock(&raw->list_lock);
248 	kfree(raw);
263 	struct gb_raw *raw = container_of(cdev, struct gb_raw, cdev);
265 	file->private_data = raw;
272 	struct gb_raw *raw = file->private_data;
281 	retval = gb_raw_send(raw, count, buf);
291 	struct gb_raw *raw = file->private_data;
295 	mutex_lock(&raw->list_lock);
296 	if (list_empty(&raw->list))
299 	raw_data = list_first_entry(&raw->list, struct raw_data, entry);
311 	raw->list_data -= raw_data->len;
316 	mutex_unlock(&raw->list_lock);
335 	.name		= "raw",