static int opiocnextprop()

in char/openprom.c [417:461]

• 36 lines of code
• 11 McCabe index (conditional complexity)

static int opiocnextprop(void __user *argp, DATA *data)
{
	struct opiocdesc op;
	struct device_node *dp;
	struct property *prop;
	char *str;
	int len;

	if (copy_from_user(&op, argp, sizeof(op)))
		return -EFAULT;

	dp = get_node(op.op_nodeid, data);
	if (!dp)
		return -EINVAL;

	str = copyin_string(op.op_name, op.op_namelen);
	if (IS_ERR(str))
		return PTR_ERR(str);

	if (str[0] == '\0') {
		prop = dp->properties;
	} else {
		prop = of_find_property(dp, str, NULL);
		if (prop)
			prop = prop->next;
	}
	kfree(str);

	if (!prop)
		len = 0;
	else
		len = prop->length;

	if (len > op.op_buflen)
		len = op.op_buflen;

	if (copy_to_user(argp, &op, sizeof(op)))
		return -EFAULT;

	if (len &&
	    copy_to_user(op.op_buf, prop->value, len))
		return -EFAULT;

	return 0;
}