static long openprom_sunos_ioctl()

in char/openprom.c [289:361]

• 60 lines of code
• 20 McCabe index (conditional complexity)

static long openprom_sunos_ioctl(struct file * file,
				 unsigned int cmd, unsigned long arg,
				 struct device_node *dp)
{
	DATA *data = file->private_data;
	struct openpromio *opp = NULL;
	int bufsize, error = 0;
	static int cnt;
	void __user *argp = (void __user *)arg;

	if (cmd == OPROMSETOPT)
		bufsize = getstrings(argp, &opp);
	else
		bufsize = copyin(argp, &opp);

	if (bufsize < 0)
		return bufsize;

	mutex_lock(&openprom_mutex);

	switch (cmd) {
	case OPROMGETOPT:
	case OPROMGETPROP:
		error = opromgetprop(argp, dp, opp, bufsize);
		break;

	case OPROMNXTOPT:
	case OPROMNXTPROP:
		error = opromnxtprop(argp, dp, opp, bufsize);
		break;

	case OPROMSETOPT:
	case OPROMSETOPT2:
		error = opromsetopt(dp, opp, bufsize);
		break;

	case OPROMNEXT:
	case OPROMCHILD:
	case OPROMSETCUR:
		error = opromnext(argp, cmd, dp, opp, bufsize, data);
		break;

	case OPROMPCI2NODE:
		error = oprompci2node(argp, dp, opp, bufsize, data);
		break;

	case OPROMPATH2NODE:
		error = oprompath2node(argp, dp, opp, bufsize, data);
		break;

	case OPROMGETBOOTARGS:
		error = opromgetbootargs(argp, opp, bufsize);
		break;

	case OPROMU2P:
	case OPROMGETCONS:
	case OPROMGETFBNAME:
		if (cnt++ < 10)
			printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n");
		error = -EINVAL;
		break;
	default:
		if (cnt++ < 10)
			printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
		error = -EINVAL;
		break;
	}

	kfree(opp);
	mutex_unlock(&openprom_mutex);

	return error;
}