linux-kernel - Re: zaurus: mmcblk0: error -110

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Date:	Tue, 12 Apr 2011 18:53:29 -0400
From:	Chris Ball <cjb@...top.org>
To:	Cyril Hrubis <metan@....cz>
Cc:	pavel@....cz, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, eric.y.miao@...il.com,
	utx@...guin.cz, zaurus-devel@...ts.linuxtogo.org,
	marek.vasut@...il.com, linux-mmc@...r.kernel.org
Subject: Re: zaurus: mmcblk0: error -110

Hi,

On Tue, Apr 12 2011, Cyril Hrubis wrote:
>> > mmc0: error -95 whilst initialising SD card
>> 
>> That's interesting.  Would you mind trying to bisect?  (Knowing whether
>> 2.6.38 final does it, for example, would be very helpful.)
>
> It may need one or two tries on 2.6.38 but it's there too.
>
>> There aren't many -EOPNOTSUPP returns in the stack.  I see:
>> 
>> card/block.c: mmc_blk_issue_secdiscard_rq and mmc_blk_issue_discard_rq
>> card/core.c: mmc_erase
>> core/sd_ops.c: mmc_app_cmd
>> 
>> Mind doing some instrumentation to figure out which it is?
>
> Fails in the mmc_app_cmd.

Okay.  mmc_app_cmd() hasn't changed for years, so I'm afraid I don't
have any strong leads for you -- further bisection (you're pretty
sure this is a regression?) would be very useful.

Thanks,

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