static int rio_mport_del_riodev()

in devices/rio_mport_cdev.c [1817:1865]

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

static int rio_mport_del_riodev(struct mport_cdev_priv *priv, void __user *arg)
{
	struct rio_rdev_info dev_info;
	struct rio_dev *rdev = NULL;
	struct device  *dev;
	struct rio_mport *mport;
	struct rio_net *net;

	if (copy_from_user(&dev_info, arg, sizeof(dev_info)))
		return -EFAULT;
	dev_info.name[sizeof(dev_info.name) - 1] = '\0';

	mport = priv->md->mport;

	/* If device name is specified, removal by name has priority */
	if (strlen(dev_info.name)) {
		dev = bus_find_device_by_name(&rio_bus_type, NULL,
					      dev_info.name);
		if (dev)
			rdev = to_rio_dev(dev);
	} else {
		do {
			rdev = rio_get_comptag(dev_info.comptag, rdev);
			if (rdev && rdev->dev.parent == &mport->net->dev &&
			    rdev->destid == dev_info.destid &&
			    rdev->hopcount == dev_info.hopcount)
				break;
		} while (rdev);
	}

	if (!rdev) {
		rmcd_debug(RDEV,
			"device name:%s ct:0x%x did:0x%x hc:0x%x not found",
			dev_info.name, dev_info.comptag, dev_info.destid,
			dev_info.hopcount);
		return -ENODEV;
	}

	net = rdev->net;
	rio_dev_put(rdev);
	rio_del_device(rdev, RIO_DEVICE_SHUTDOWN);

	if (list_empty(&net->devices)) {
		rio_free_net(net);
		mport->net = NULL;
	}

	return 0;
}