Re: [PATCH v4 4/7] iommu/vt-d: Use pci_real_dma_dev() for mapping

[Christoph Hellwig <hch@xxxxxx>]

On Fri, Jan 17, 2020 at 09:27:26AM -0700, Jon Derrick wrote:
> +	if (dev_is_pci(dev)) {
> +		struct pci_dev *pdev;
> +
> +		pdev = pci_real_dma_dev(to_pci_dev(dev));
> +		dev = &pdev->dev;

I think this could be simplified to

	if (dev_is_pci(dev))
		dev = &pci_real_dma_dev(to_pci_dev(dev)->dev;