linux-kernel - Re: [PATCH v4 01/14] PCI/P2PDMA: Support peer-to-peer memory

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Date:   Mon, 7 May 2018 17:09:46 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-block@...r.kernel.org,
        Stephen Bates <sbates@...thlin.com>,
        Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        Keith Busch <keith.busch@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH v4 01/14] PCI/P2PDMA: Support peer-to-peer memory

Thanks for the review. I'll apply all of these for the changes for next
version of the set.
>> +/*
>> + * If a device is behind a switch, we try to find the upstream bridge
>> + * port of the switch. This requires two calls to pci_upstream_bridge():
>> + * one for the upstream port on the switch, one on the upstream port
>> + * for the next level in the hierarchy. Because of this, devices connected
>> + * to the root port will be rejected.
>> + */
>> +static struct pci_dev *get_upstream_bridge_port(struct pci_dev *pdev)
> 
> This function doesn't seem to be used anymore.  Thanks for all your hard
> work to get rid of it!

Oops, I thought I had gotten rid of it entirely, but I guess I messed it
up a bit and it gets removed in patch 4. I'll fix it for v5.

Logan