linux-kernel - Re: [ 064/218] mmc: card: Skip secure erase on MoviNAND; causes unrecoverable corruption.

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Date:	Sat, 29 Sep 2012 02:14:03 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Ian Chen <ian.cy.chen@...sung.com>, Chris Ball <cjb@...top.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk, Namjae Jeon <linkinjeon@...il.com>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [ 064/218] mmc: card: Skip secure erase on MoviNAND; causes
 unrecoverable corruption.

On Fri, 2012-09-28 at 13:14 -0700, Greg Kroah-Hartman wrote:
> 3.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Ian Chen <ian.cy.chen@...sung.com>
> 
> commit 3550ccdb9d8d350e526b809bf3dd92b550a74fe1 upstream.
> 
> For several MoviNAND eMMC parts, there are known issues with secure
> erase and secure trim.  For these specific MoviNAND devices, we skip
> these operations.
> 
> Specifically, there is a bug in the eMMC firmware that causes
> unrecoverable corruption when the MMC is erased with MMC_CAP_ERASE
> enabled.
> 
> References:
> 
> http://forum.xda-developers.com/showthread.php?t=1644364
> https://plus.google.com/111398485184813224730/posts/21pTYfTsCkB#111398485184813224730/posts/21pTYfTsCkB
> 
> Signed-off-by: Ian Chen <ian.cy.chen@...sung.com>
> Reviewed-by: Namjae Jeon <linkinjeon@...il.com>
> Acked-by: Jaehoon Chung <jh80.chung@...sung.com>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Chris Ball <cjb@...top.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[...]

I think you owe Greg a backport of this to 3.0.

Ben.

-- 
Ben Hutchings
Usenet is essentially a HUGE group of people passing notes in class.
                      - Rachel Kadel, `A Quick Guide to Newsgroup Etiquette'

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