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Groups > linux.kernel > #1658645
| From | Geert Uytterhoeven <geert@linux-m68k.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling |
| Date | 2017-06-06 13:20 +0200 |
| Message-ID | <tPkGJ-82Q-3@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <tPiYi-6PD-17@gated-at.bofh.it> <tPjAZ-7ik-7@gated-at.bofh.it> <tPjUl-7rj-7@gated-at.bofh.it> <tPk41-7uB-7@gated-at.bofh.it> <tPknp-7Bq-49@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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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[RFC PATCH 2/4] i2c: add docs to clarify DMA handling Wolfram Sang <wsa+renesas@sang-engineering.com> - 2017-06-06 11:30 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Geert Uytterhoeven <geert@linux-m68k.org> - 2017-06-06 12:10 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Wolfram Sang <wsa@the-dreams.de> - 2017-06-06 12:30 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Geert Uytterhoeven <geert@linux-m68k.org> - 2017-06-06 12:40 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Wolfram Sang <wsa@the-dreams.de> - 2017-06-06 13:00 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Geert Uytterhoeven <geert@linux-m68k.org> - 2017-06-06 13:20 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Wolfram Sang <wsa@the-dreams.de> - 2017-06-06 13:30 +0200
Re: [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Geert Uytterhoeven <geert@linux-m68k.org> - 2017-06-06 17:30 +0200
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