linux-kernel - Re: [PATCH v3 5/6] media: uvcvideo: Use dma_alloc

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Date:   Thu, 28 Jan 2021 08:57:37 +0100
From:   ". Christoph Hellwig" <hch@....de>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     ". Christoph Hellwig" <hch@....de>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        IOMMU DRIVERS <iommu@...ts.linux-foundation.org>,
        Joerg Roedel <joro@...tes.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Sergey Senozhatsky <senozhatsky@...gle.com>
Subject: Re: [PATCH v3 5/6] media: uvcvideo: Use dma_alloc_noncontiguos API

On Wed, Jan 27, 2021 at 10:35:02PM +0100, Ricardo Ribalda wrote:
> I have used the current API here:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/ribalda/linux.git/log/?h=uvc-noncontiguous
> 
> And I think the result is very clean. Great work!
> 
> I have tested it in X86 and in arm64, with similar performance as the
> previous patchset.
> 
> Maybe you want to cherry pick that commit into your series I can also
> send the patch to the list for review if you prefer so.
> 
> At least in 5.11 rc5 I the same dmadev worked in arm64 and x86.

Given that Sergey mentioned the v4l patchset needs more work I'll
use your commit as the example for sending out my series.

Thanks for all the work!