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Date: Mon, 21 Jan 2019 13:30:28 -0800 From: Christoph Hellwig <hch@...radead.org> To: Liam Mark <lmark@...eaurora.org> Cc: "Andrew F. Davis" <afd@...com>, Christoph Hellwig <hch@...radead.org>, Laura Abbott <labbott@...hat.com>, sumit.semwal@...aro.org, arve@...roid.com, tkjos@...roid.com, maco@...roid.com, joel@...lfernandes.org, christian@...uner.io, devel@...verdev.osuosl.org, dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org, john.stultz@...aro.org Subject: Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes On Mon, Jan 21, 2019 at 12:20:42PM -0800, Liam Mark wrote: > I have left this to clients, but if they own the buffer they can have the > knowledge as to whether CPU access is needed in that use case (example for > post-processing). That is an API design which the user is more likely to get wrong than right and thus does not pass the smell test.
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