int vme_check_window()

in vme.c [193:234]

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

int vme_check_window(u32 aspace, unsigned long long vme_base,
		     unsigned long long size)
{
	int retval = 0;

	if (vme_base + size < size)
		return -EINVAL;

	switch (aspace) {
	case VME_A16:
		if (vme_base + size > VME_A16_MAX)
			retval = -EFAULT;
		break;
	case VME_A24:
		if (vme_base + size > VME_A24_MAX)
			retval = -EFAULT;
		break;
	case VME_A32:
		if (vme_base + size > VME_A32_MAX)
			retval = -EFAULT;
		break;
	case VME_A64:
		/* The VME_A64_MAX limit is actually U64_MAX + 1 */
		break;
	case VME_CRCSR:
		if (vme_base + size > VME_CRCSR_MAX)
			retval = -EFAULT;
		break;
	case VME_USER1:
	case VME_USER2:
	case VME_USER3:
	case VME_USER4:
		/* User Defined */
		break;
	default:
		printk(KERN_ERR "Invalid address space\n");
		retval = -EINVAL;
		break;
	}

	return retval;
}