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From: Pierre Ossman <drzeus-mmc@drzeus.cx>
To: Alex Dubov <oakad@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Weird MMC errors: 1 of 2 - bad ocr value
Date: Sun, 08 Apr 2007 21:41:04 +0200	[thread overview]
Message-ID: <46194550.30203@drzeus.cx> (raw)
In-Reply-To: <20070314144437.3695.qmail@web36706.mail.mud.yahoo.com>

Alex Dubov wrote:
> Recently, I've obtained a bug report concerning an MMC card. Two problems are described, both
> sporadic.
> Problem 1: illegal ocr value is returned. You may notice, in the non-working case, obviously
> incorrect ocr value (0xffffffff) is returned. The card won't work after this, unless reinserted.
> What, to your opinion, shall we do about it?
> 

I got something similar when there was problem with the power supply. The card
was booting through power it drain from the other pins, but it didn't work
correctly.

Try adding some more delay after you power up in case the controller needs some
time to stabilize.

-- 
     -- Pierre Ossman

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

      reply	other threads:[~2007-04-08 19:38 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-07 22:20 [2.6.20] tifm_7xx1/mmc not working Andreas Steinmetz
2007-02-08  5:59 ` Pierre Ossman
2007-02-08 23:35   ` Alex Dubov
2007-02-09 12:27     ` Andreas Steinmetz
2007-02-09 15:14   ` Recent and not-so problems with tifm_sd driver Alex Dubov
2007-02-09 19:10     ` Pierre Ossman
2007-02-10  9:12       ` Recent and not-so problems with tifm_sd driver - one more Alex Dubov
2007-02-10 13:01         ` Pierre Ossman
2007-02-11  6:03           ` Brad Campbell
2007-02-11 14:52             ` Fabio Comolli
2007-02-11 15:40             ` Pierre Ossman
2007-02-11 15:56               ` Brad Campbell
2007-02-11 18:04                 ` Pierre Ossman
2007-02-11 19:32                   ` Brad Campbell
2007-02-12  9:14                     ` Pierre Ossman
2007-02-12 10:50                       ` Brad Campbell
2007-02-12 13:21                     ` Andreas Steinmetz
2007-02-17 15:16                   ` [mmc] incorrect behavior on resume Alex Dubov
2007-02-17 23:35                     ` Pierre Ossman
2007-02-18  0:29                       ` Pavel Machek
2007-02-18  1:46                         ` Alex Dubov
2007-02-18  6:53                           ` Russell King
2007-02-18 12:18                             ` Alex Dubov
2007-02-11  4:47       ` Recent and not-so problems with tifm_sd driver Alex Dubov
2007-02-11 18:15         ` Pierre Ossman
2007-02-12 11:53           ` Alex Dubov
2007-02-12 13:49             ` Pierre Ossman
2007-02-13  0:44               ` Alex Dubov
2007-02-13 14:40               ` Alex Dubov
2007-02-17 23:14                 ` Pierre Ossman
2007-02-17 23:51             ` Pierre Ossman
2007-02-18  4:59               ` Alex Dubov
2007-02-18  8:13                 ` Pierre Ossman
2007-02-18 14:19                   ` Alex Dubov
2007-02-18 15:10                     ` Pierre Ossman
2007-02-18 23:48                       ` Alex Dubov
2007-02-19  7:06                         ` Pierre Ossman
2007-02-19 12:09                           ` Alex Dubov
2007-02-19 12:34                             ` Pierre Ossman
2007-02-20  1:30                               ` Alex Dubov
2007-02-20  7:03                                 ` Pierre Ossman
2007-03-14 14:44                               ` Weird MMC errors: 1 of 2 - bad ocr value Alex Dubov
2007-04-08 19:41                                 ` Pierre Ossman [this message]

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