static int w1_process_command_root()

in w1_netlink.c [397:440]

• 37 lines of code
• 3 McCabe index (conditional complexity)

static int w1_process_command_root(struct cn_msg *req_cn, u32 portid)
{
	struct w1_master *dev;
	struct cn_msg *cn;
	struct w1_netlink_msg *msg;
	u32 *id;

	cn = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!cn)
		return -ENOMEM;

	cn->id.idx = CN_W1_IDX;
	cn->id.val = CN_W1_VAL;

	cn->seq = req_cn->seq;
	cn->ack = req_cn->seq + 1;
	cn->len = sizeof(struct w1_netlink_msg);
	msg = (struct w1_netlink_msg *)cn->data;

	msg->type = W1_LIST_MASTERS;
	msg->status = 0;
	msg->len = 0;
	id = (u32 *)msg->data;

	mutex_lock(&w1_mlock);
	list_for_each_entry(dev, &w1_masters, w1_master_entry) {
		if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) {
			cn_netlink_send(cn, portid, 0, GFP_KERNEL);
			cn->len = sizeof(struct w1_netlink_msg);
			msg->len = 0;
			id = (u32 *)msg->data;
		}

		*id = dev->id;
		msg->len += sizeof(*id);
		cn->len += sizeof(*id);
		id++;
	}
	cn_netlink_send(cn, portid, 0, GFP_KERNEL);
	mutex_unlock(&w1_mlock);

	kfree(cn);
	return 0;
}