static int ifcvf_probe()

in ifcvf/ifcvf_main.c [566:637]

• 61 lines of code
• 9 McCabe index (conditional complexity)

static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
	struct device *dev = &pdev->dev;
	u32 dev_type;
	int ret;

	ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
	if (!ifcvf_mgmt_dev) {
		IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
		return -ENOMEM;
	}

	dev_type = get_dev_type(pdev);
	switch (dev_type) {
	case VIRTIO_ID_NET:
		ifcvf_mgmt_dev->mdev.id_table = id_table_net;
		break;
	case VIRTIO_ID_BLOCK:
		ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
		break;
	default:
		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
		ret = -EOPNOTSUPP;
		goto err;
	}

	ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
	ifcvf_mgmt_dev->mdev.device = dev;
	ifcvf_mgmt_dev->pdev = pdev;

	ret = pcim_enable_device(pdev);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to enable device\n");
		goto err;
	}

	ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
				 IFCVF_DRIVER_NAME);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to request MMIO region\n");
		goto err;
	}

	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
	if (ret) {
		IFCVF_ERR(pdev, "No usable DMA configuration\n");
		goto err;
	}

	ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
	if (ret) {
		IFCVF_ERR(pdev,
			  "Failed for adding devres for freeing irq vectors\n");
		goto err;
	}

	pci_set_master(pdev);

	ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
	if (ret) {
		IFCVF_ERR(pdev,
			  "Failed to initialize the management interfaces\n");
		goto err;
	}

	return 0;

err:
	kfree(ifcvf_mgmt_dev);
	return ret;
}