[PATCH v2 04/10] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches

[Logan Gunthorpe]

On 01/03/18 02:35 PM, Jerome Glisse wrote:
> Note that they are usecase for P2P where IOMMU isolation matter and
> the traffic through root complex isn't see as an issue. 

Well, we can worry about that once we have a solution to the problem of 
knowing whether a root complex supports P2P at all. I'm not sure how 
people are going to solve that one.

For the time being, this work is for cards behind a switch only.

Logan