Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support

[Nicolin Chen]

On Wed, Sep 30, 2020 at 08:10:00AM +0300, Dmitry Osipenko wrote:
> 30.09.2020 03:30, Nicolin Chen пишет:
> ...
> > +#ifdef CONFIG_PCI
> > +	if (!iommu_present(&pci_bus_type)) {
> 
> Could you please explain why this check is needed?

That's referencing what's in the arm-smmu.c file, since it does
not hurt to have a check.