Re: [PATCH v3 03/14] PCI/P2PDMA: Add constants for map type results to upstream_bridge_distance()

[Christoph Hellwig]

On Mon, Aug 12, 2019 at 11:30:37AM -0600, Logan Gunthorpe wrote:
> Add constant flags to indicate how two devices will be mapped or if they
> are unsupported. upstream_bridge_distance() will now return the
> mapping type and the distance in a passed-by-reference argument.
> 
> This helps annotate the code better, but the main reason is so we can use
> the information to store the required mapping method in an xarray.
> 
> Link: https://lore.kernel.org/r/20190730163545.4915-4-logang@xxxxxxxxxxxx
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Reviewed-by: Christian König <christian.koenig@xxxxxxx>

Looks good,

Reviewed-by: Christoph Hellwig <hch@xxxxxx>