drivers/staging/ks7010 hardware test

[Wolfram Sang]

Hi Tobin,

> I began testing the card you sent today. I'm getting a firmware load
> error like you mentioned.

Nice. Firstly, that means the card is alive and survived the mailing.

> I checked out code from when you originally merged into staging,
> however I built the module in a 4.9 kernel.

I think building a vanilla 4.9 kernel is a good choice. I did test the
card with v4.9. I am quite (but not perfectly) sure, I also tested it
with v4.10.

> To help me track down the issue could you please tell me what testing
> you managed to do successfully in the past, and if you can,
> approximately the date you were doing the tests or the git commit of
> the code you tested.

The tests I did are described here:

http://elinux.org/Tests:SDIO-KS7010

The branch I used is mentioned there

https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/log/?h=renesas/topic/gen3-sdio

but it is based on a branch called renesas-drivers (which is some kind
of stripped down linux-next targeted for Renesas R-Car hardware), so I'd
think v4.9 is the better choice.

The tests were all done End of May 2016.

> Thanks. Oh, also could you please indicate your level of interest my
> continued efforts. I don't want to send you copious emails if you
> would rather me not.

I'm definately interested. I might not be able to review patches, but
for high level questions like this, please CC me. However, give me a few
days for a response.

> The error code is -EILSEQ (Illegal byte sequence). It is returned by
> sdio_memcpy_fromio(). I do not know what it signifies?

I use it rarely, but in this case, I'd think bisecting from v4.9 onwards
is a good choice to tackle this down (given that v4.9 works; otherwise
we'll have to check the MMC layer).

Thanks and all the best,

   Wolfram

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