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SubjectRe: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling
Hi Wolfram,

On Tue, Jun 6, 2017 at 12:54 PM, Wolfram Sang <wsa@the-dreams.de> wrote:
>> So it won't fall back to PIO if CONFIG_DMA_API_DEBUG is enabled?
>
> No, it will complain loudly with more details about the same things (and
> some more). But for that to do, it cannot fall back to PIO.
>
> Otherwise, you might get the idea that all is fine since you enabled
> CONFIG_DMA_API_DEBUG but miss that most of you transfers fell back to
> PIO. That was my thinking...

Hmm....

I have it enabled all the time. So my devices may stop working...

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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