static int mtk_rpmsg_ns_cb()

in mtk_rpmsg.c [268:305]

• 24 lines of code
• 4 McCabe index (conditional complexity)

static int mtk_rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
			   void *priv, u32 src)
{
	struct rpmsg_ns_msg *msg = data;
	struct mtk_rpmsg_rproc_subdev *mtk_subdev = priv;
	struct device *dev = &mtk_subdev->pdev->dev;

	int ret;

	if (len != sizeof(*msg)) {
		dev_err(dev, "malformed ns msg (%d)\n", len);
		return -EINVAL;
	}

	/*
	 * the name service ept does _not_ belong to a real rpmsg channel,
	 * and is handled by the rpmsg bus itself.
	 * for sanity reasons, make sure a valid rpdev has _not_ sneaked
	 * in somehow.
	 */
	if (rpdev) {
		dev_err(dev, "anomaly: ns ept has an rpdev handle\n");
		return -EINVAL;
	}

	/* don't trust the remote processor for null terminating the name */
	msg->name[RPMSG_NAME_SIZE - 1] = '\0';

	dev_info(dev, "creating channel %s addr 0x%x\n", msg->name, msg->addr);

	ret = mtk_rpmsg_create_device(mtk_subdev, msg->name, msg->addr);
	if (ret) {
		dev_err(dev, "create rpmsg device failed\n");
		return ret;
	}

	return 0;
}