Re: [PATCH 2/2] NTB: PCI Quirk to Enable Switchtec NT Functionality with IOMMU On

[Logan Gunthorpe]

On 23/05/18 07:33 AM, Bjorn Helgaas wrote:
> This (and Alex's) analysis is very useful and I'd like to capture it
> somehow, perhaps by expanding the poor pci_add_dma_alias() function
> comment I added with f0af9593372a ("PCI: Add pci_add_dma_alias() to
> abstract implementation").
> 
> The admonition to "call early" without any details about *how* early
> or *why* it needs to be called early is not really very useful.
> 
> If we added your analysis, it would be a great help to anybody who
> reworks IOMMU groups in the future.

Sure, I'll work up a patch and send it on shortly.

Logan