Messages in this thread | | | Date | Wed, 12 Dec 2018 01:09:17 -0800 | From | Christoph Hellwig <> | Subject | Re: [PATCH v5 2/2] media: usb: pwc: Don't use coherent DMA buffers for ISO transfer |
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On Wed, Dec 12, 2018 at 05:57:02PM +0900, Tomasz Figa wrote: > How about dma_sync_sg_*()? I'd expect some drivers to export/import > such memory via sg, since that's the typical way of describing memory > in DMA-buf.
The way it is implemented dma_sync_sg_* would just work, however there really should be no need to have sglists for buffers created by this API.
> Sounds good to me. Thanks for working on this. I'd be happy to be on > CC and help with review when you post the patches later.
The patches were already posted here:
https://lists.linuxfoundation.org/pipermail/iommu/2018-December/031982.html
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