linux-kernel - Re: [PATCH v2 2/2] dma-contiguous: Use fallback alloc

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Date:   Mon, 26 Aug 2019 10:56:14 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     Christoph Hellwig <hch@....de>,
        Robin Murphy <robin.murphy@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>, vdumpa@...dia.com,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Tony Lindgren <tony@...mide.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Thierry Reding <treding@...dia.com>,
        Kees Cook <keescook@...omium.org>, iamjoonsoo.kim@....com,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-xtensa@...ux-xtensa.org, iommu@...ts.linux-foundation.org
Subject: Re: [PATCH v2 2/2] dma-contiguous: Use fallback alloc_pages for
 single pages

Hi Nicolin,

On Sat, Aug 24, 2019 at 7:10 AM Nicolin Chen <nicoleotsuka@...il.com> wrote:
>
> On Fri, Aug 23, 2019 at 09:49:46PM +0900, Masahiro Yamada wrote:

> >
> > Reverting this commit fixed the problem.
>
> We are having another problem with the new API and Christoph
> submitted a patch at: https://lkml.org/lkml/2019/8/20/86
>
> Would it be possible for you to test to see if it can fix?


It is included in 5.3-rc6

I tested 5.3-rc6 in on my board,
but I still see the same DMA fauilure.


Masahiro





> We can revert my fallback change after all, if Christoph's
> patch doesn't work for you either.
>
> Thanks
> Nicolin



-- 
Best Regards
Masahiro Yamada