__iommu_attach_device
static int __iommu_attach_device(struct iommu_domain *domain,
return __iommu_attach_device(domain, dev, NULL);
ret = __iommu_attach_device(new_domain, dev, old_domain);
__iommu_attach_device(group->blocking_domain, dev,
ret = __iommu_attach_device(group->blocking_domain, &pdev->dev,
WARN_ON(__iommu_attach_device(group->domain, &pdev->dev,