linux-kernel - Re: SDHCI regression since 2.6.39

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Message-ID: <m2aaa89t1m.fsf@bob.laptop.org>
Date:	Tue, 13 Sep 2011 14:49:25 -0400
From:	Chris Ball <cjb@...top.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	linux-mmc@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Manoj Iyer <manoj.iyer@...onical.com>
Subject: Re: SDHCI regression since 2.6.39

Hi,

On Tue, Sep 13 2011, Jeremy Fitzhardinge wrote:
>> If it is running, and not helping, can I persuade you to try a full
>> bisection?
>
> OK, will do.

Thank you!

>>   I don't think we have other reports of this bug, and the
>> only other person who has reported something like it wasn't a kernel
>> hacker.
>
> That's interesting; the X220 is a pretty common machine these days, I
> think.  I wonder if there's variations in the SD controller or something?

I just asked Matthew Garrett to check his X220, and his has the same e823
controller as you, is running a 3.1-rc kernel, and everything's working.

So it's not even variation in the controller model, it's something even
more subtle.  Perhaps try some different cards?  What capacity/speed is
the one you're trying?  If there is a per-card difference, I suppose
we'd expect it to be that slower cards work and faster cards fail
(given the nature of the patch I linked in my last mail).

Thanks,

- Chris.
-- 
Chris Ball   <cjb@...top.org>   <http://printf.net/>
One Laptop Per Child
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