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Date:   Thu, 7 May 2020 09:41:36 +0800
From:   Huacai Chen <>
To:     Christoph Hellwig <>
Cc:     Tiezhu Yang <>,
        Thomas Bogendoerfer <>,
        Jiaxun Yang <>,
        "open list:MIPS" <>,
        LKML <>,
        Xuefeng Li <>
Subject: Re: [PATCH v6] MIPS: Loongson: Add DMA support for LS7A

Hi, Christoph,

On Wed, May 6, 2020 at 10:44 PM Christoph Hellwig <> wrote:
> On Wed, May 06, 2020 at 04:47:30PM +0800, Huacai Chen wrote:
> > > For the above reasons, I think what you are concerned is not a
> > > big deal.
> > I don't think so, this is obviously a regression. If we can accept a
> > regression of RS780E, why we still maintain Loongson-2EF rather than
> > simply drop them?
> While I much prefer to use the default, regression an otherwise
> working platform seems like a bad idea.  I don't really know much
> about the Loongson platforms, do they all boot using the same kernel
> image?
All Loongson-3 machines (with LS7A bridge or RS780 bridge) use the
same kernel image.

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