linux-kernel - Re: [PATCH v3 03/14] PCI/P2PDMA: Add constants for map type results to upstream_bridge

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Date:   Fri, 16 Aug 2019 10:08:15 +0200
From:   Christoph Hellwig <hch@....de>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Christian Koenig <Christian.Koenig@....com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Dan Williams <dan.j.williams@...el.com>,
        Eric Pilmore <epilmore@...aio.com>,
        Stephen Bates <sbates@...thlin.com>
Subject: Re: [PATCH v3 03/14] PCI/P2PDMA: Add constants for map type
 results to upstream_bridge_distance()

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@deltatee.com
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> Reviewed-by: Christian König <christian.koenig@....com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>