static int rpmsg_ns_cb()

in rpmsg_ns.c [33:74]

• 34 lines of code
• 6 McCabe index (conditional complexity)

static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
		       void *priv, u32 src)
{
	struct rpmsg_ns_msg *msg = data;
	struct rpmsg_device *newch;
	struct rpmsg_channel_info chinfo;
	struct device *dev = rpdev->dev.parent;
	int ret;

#if defined(CONFIG_DYNAMIC_DEBUG)
	dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1,
			 data, len, true);
#endif

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

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

	strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
	chinfo.src = RPMSG_ADDR_ANY;
	chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr);

	dev_info(dev, "%sing channel %s addr 0x%x\n",
		 rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY ?
		 "destroy" : "creat", msg->name, chinfo.dst);

	if (rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY) {
		ret = rpmsg_release_channel(rpdev, &chinfo);
		if (ret)
			dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
	} else {
		newch = rpmsg_create_channel(rpdev, &chinfo);
		if (!newch)
			dev_err(dev, "rpmsg_create_channel failed\n");
	}

	return 0;
}