From: Douglas Gilbert <dgilbert@interlog.com>
To: Chris Ball <cjb@laptop.org>
Cc: linux-mmc@vger.kernel.org,
Nicolas Ferre <nicolas.ferre@atmel.com>,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>,
ludovic.desroches@atmel.com, akpm@linux-foundation.org
Subject: Re: [Bug 39822] SDHC cards no longer recognized on AT91 based board
Date: Mon, 24 Oct 2011 21:54:44 -0400 [thread overview]
Message-ID: <4EA616E4.2060405@interlog.com> (raw)
In-Reply-To: <m28vridl10.fsf@bob.laptop.org>
On 11-07-28 07:48 PM, Chris Ball wrote:
> Hi, thanks for the bug report. Adding linux-mmc@ and some atmel driver
> folks to CC.
>
> On Thu, Jul 28 2011, bugzilla-daemon@bugzilla.kernel.org wrote:
>> Prior to 3.0.0 the FoxG20 board (Atmel AT91SAM9G20) could boot and use
>> both micro SD and SDHC card to contain its root file system. With the
>> advent of the 3.0.0 kernel the micro SDHC card is unable to mount the
>> root file system.
>>
>> Comparing the relevant part of dmesg for 2.6.38.6 (and it worked on
>> 2.6.39):
>> ...
>> Waiting for root device /dev/mmcblk0p2...
>> mmc0: host does not support reading read-only switch. assuming write-enable.
>> at91_mci at91_mci: Timeout waiting end of packet
>> mmc0: new SDHC card at address 1234
>> mmcblk0: mmc0:1234 SA04G 3.67 GiB
>> mmcblk0: p1 p2 p3
>> ...
>>
>> to the same dmesg section for 3.0.0 :
>> ...
>> Waiting for root device /dev/mmcblk0p2...
>> mmc0: error -110 whilst initialising SD card
>> at91_mci at91_mci: Timeout waiting end of packet
>> mmc0: error -110 whilst initialising SD card
>> [no further progress]
>>
>> Non "HC" SD cards work as expected in 3.0.0
>
> If no-one on the CC list has any ideas, would you be interested in
> trying to bisect this change?
>
> Another possibility would be adding printks before all of the -ETIMEDOUT
> lines in core/* and host/at*, in order to see which one you're hitting
> (and therefore which operation is causing the initialization to fail).
> But a full bisection would be more conclusive.
Still broken in lk 3.1.0, same errors in dmesg.
Doug Gilbert
next prev parent reply other threads:[~2011-10-25 1:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-39822-26132@https.bugzilla.kernel.org/>
[not found] ` <201107282323.p6SNN9Jk026454@demeter1.kernel.org>
2011-07-28 23:48 ` [Bug 39822] SDHC cards no longer recognized on AT91 based board Chris Ball
2011-07-29 4:03 ` Douglas Gilbert
2011-10-25 1:54 ` Douglas Gilbert [this message]
2012-01-29 0:37 ` Douglas Gilbert
2012-01-29 17:22 ` Jean-Christophe PLAGNIOL-VILLARD
2012-01-29 19:40 ` Douglas Gilbert
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