On 1/4/2018 11:28 AM, Gary R Hook wrote: > On 01/04/2018 06:25 AM, Sinan Kaya wrote: >> On 12/19/2017 12:37 AM, Sinan Kaya wrote: >>> pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as >>> where a PCI device is present. This restricts the device drivers to be >>> reused for other domain numbers. >>> >>> Getting ready to remove pci_get_bus_and_slot() function in favor of >>> pci_get_domain_bus_and_slot(). >>> >>> Hard-code the domain number as 0 for the AMD IOMMU driver. > > <snip> > >> >> Any comments from the IOMMU people? >> > > pci_get_bus_and_slot() appears to (now) be a convenience function that wraps pci_get_domain_bus_and_slot() while using a 0 for the domain value. Exactly what you are doing here, albeit in a more overt way. > > How is this patch advantageous? Seems to me that if other domains need to be enabled, that driver could be changed if and when that requirement arises. > > But perhaps I'm missing a nuance here. > > The benefit of the change was discussed here: https://lkml.org/lkml/2017/12/19/349 I hope it helps. -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
