linux-kernel - Re: [PATCH v3 12/14] PCI/P2PDMA: dma_map() requests that traverse the host bridge

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Message-ID: <20190816081548.GL9249@lst.de>
Date:   Fri, 16 Aug 2019 10:15:48 +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 12/14] PCI/P2PDMA: dma_map() requests that traverse
 the host bridge

On Mon, Aug 12, 2019 at 11:30:46AM -0600, Logan Gunthorpe wrote:
> Any requests that traverse the host bridge will need to be mapped into the
> IOMMU, so call dma_map_sg() inside pci_p2pdma_map_sg() when appropriate.
> 
> Similarly, call dma_unmap_sg() inside pci_p2pdma_unmap_sg().
> 
> Link: https://lore.kernel.org/r/20190730163545.4915-13-logang@deltatee.com
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

Looks good,

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