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SubjectRe: [PATCH 0/7] MIPS DMA coherence fixes
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On 2023-02-21 18:15, Jiaxun Yang wrote:
>
>
>> 2023年2月21日 17:54,Christoph Hellwig <hch@lst.de> 写道:
>>
>> Can you explain the motivation here? Also why riscv patches are at
>> the end of a mips fіxes series?
>
> Ah sorry for any confusion.
>
> So the main purpose of this patch is to fix MIPS’s broken per-device coherency.
> To be more precise, we want to be able to control the default coherency for all devices probed from
> devicetree in early boot code.

Including the patch which actually does that would be helpful. As it is,
patches 4-7 here just appear to be moving an option around for no
practical effect.

Robin.

> To achieve that I decided to reuse dma_default_coherent to set default coherency for devicetree.
> And all later patches are severing for this purpose.
>
> Thanks
> - Jiaxun

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