linux-kernel - Re: mmc_spi stopped working

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Message-ID: <20071027145233.39e986e3@poseidon.drzeus.cx>
Date:	Sat, 27 Oct 2007 14:52:33 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	David Brownell <david-b@...bell.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: mmc_spi stopped working

On Wed, 24 Oct 2007 15:37:10 -0700
David Brownell <david-b@...bell.net> wrote:

> On Monday 22 October 2007, Pierre Ossman wrote:
> > 
> > I've been testing a bit more here, and I can't get this particular bug.
> 
> It's not just a bug, it's a regression ... a new bug which
> was introduced by some patch.  ;)
> 

It's a bug in the card, which is what I was referring to. ;)

> 
> SPI works fine on all the MMC and SD cards I've got here,
> other than the minor glitch fixed by the "don't just probe"
> patch I sent.
> 

Lucky you. :)

> As you know, to be spec-conformant they *must* support SPI.

I never recall which of the different specs require SPI (not all do).

> Agreed, there are too many vendors who don't appear to value
> following specs.  If those cards which are using the MMC or
> SD trade marks, you might notify the relevant consortium and
> asking them to fix those vendors.  ;)
> 

Hah! The SD and MMC boys seem to have no interest in people following the specs, considering all the shite that is out there.

> 
> > As for your card, could you send me a dump as I'm unable to produce
> > the issue here? 
> 
> I'm not sure what you mean by "dump", but appended the sysfs attributes
> produced after I disabled that new "just probe" mechanism.
> 

A dmesg with MMC_DEBUG so that I can see just how the card misbehaves.

Also, I see you're dying for my decodecid and decodecsd progs. ;)
I've included both.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org

View attachment "crc7.c" of type "text/x-csrc" (925 bytes)

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View attachment "decodecid.c" of type "text/x-csrc" (1317 bytes)

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