Re: [PATCH 4/6] pci/dmar/sriov: use physfn to search drhd for VF

[Chris Wright <chrisw@sous-sol.org>]

* Yinghai (yinghai.lu@oracle.com) wrote:
> --- linux-2.6.orig/drivers/pci/dmar.c
> +++ linux-2.6/drivers/pci/dmar.c
> @@ -534,6 +534,8 @@ dmar_find_matched_drhd_unit(struct pci_d
>  	struct dmar_drhd_unit *dmaru = NULL;
>  	struct acpi_dmar_hardware_unit *drhd;
>  
> +	dev = pci_physfn(dev);
> +

Yeah, we typically don't have enough VF's to wrap bus numbers, or we're
under a catchall IOMMU.  In the catchall case both vf->bus and vf->pf->bus
will have the same domain (segment) regardless of whether we have large
VF count or big offset/stride.  So, I suppose this could be done inside
of dmar_pci_device_match().

Otherwise, I think you'd want to add the same thing to
dmar_find_matched_atsr_unit() since it's the same device scopes there.

thanks,
-chris