HID: hid-led: add support for reading from LED devices

	return ret == ldev->config->report_size ? 0 : -EMSGSIZE;

}

/* reading data is supported for report type RAW_REQUEST only */

static int hidled_recv(struct hidled_device *ldev, __u8 *buf)

{

	int ret;

	if (ldev->config->report_type != RAW_REQUEST)

		return -EINVAL;

	buf[0] = ldev->config->report_id;

	mutex_lock(&ldev->lock);

	ret = hid_hw_raw_request(ldev->hdev, buf[0], buf,

				 ldev->config->report_size,

				 HID_FEATURE_REPORT,

				 HID_REQ_SET_REPORT);

	if (ret < 0)

		goto err;

	ret = hid_hw_raw_request(ldev->hdev, buf[0], buf,

				 ldev->config->report_size,

				 HID_FEATURE_REPORT,

				 HID_REQ_GET_REPORT);

err:

	mutex_unlock(&ldev->lock);

	return ret < 0 ? ret : 0;

}

static u8 riso_kagaku_index(struct hidled_rgb *rgb)

{

	enum led_brightness r, g, b;