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From: Logan Gunthorpe <logang@deltatee.com>
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Date: Fri, 21 Sep 2018 14:01:13 -0600
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Subject: Re: [PATCH v6 03/13] PCI/P2PDMA: Add PCI p2pmem DMA mappings to
 adjust the bus offset
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To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Alex Williamson <alex.williamson@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>, =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Bjorn Helgaas <bhelgaas@google.com>, Max Gurtovoy <maxg@mellanox.com>, Christoph Hellwig <hch@lst.de>, =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>
List-ID: <linux-nvdimm@lists.01.org>

On 2018-09-21 2:00 PM, Bjorn Helgaas wrote:
> Ok.  I was assuming s->dma_address would have been already set before
> the call and would be overwritten by pci_p2pmem_map_sg().  But I guess
> that's not the case -- sounds like s->dma_address is undefined before
> the call.

Correct. It's set by whatever dma_map function operates on it.

Logan
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