linux-kernel - RE: [PATCH] RFC: mmc: dw_mmc: Always go to STATE_DATA_BUSY from STATE_DATA

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Date:	Tue, 18 Jun 2013 12:46:47 -0700
From:	Bing Zhao <bzhao@...vell.com>
To:	Seungwon Jeon <tgih.jun@...sung.com>,
	'Doug Anderson' <dianders@...omium.org>
CC:	'Jaehoon Chung' <jh80.chung@...sung.com>,
	'Chris Ball' <cjb@...top.org>,
	'Will Newton' <will.newton@...il.com>,
	'Ashok Nagarajan' <asnagarajan@...omium.org>,
	'Paul Stewart' <pstew@...omium.org>,
	'Olof Johansson' <olof@...om.net>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] RFC: mmc: dw_mmc: Always go to STATE_DATA_BUSY from
 STATE_DATA_ERROR

Hi Seungwon,

> > I don't have the failing unit myself, so we'll have to get Bing to try
> > the patches.  You are suggesting that we try applying both of your
> > patches, right?
> Did you test the patch?
> I wonder that both are good for your side.

I tested Doug's patch on my failing unit.

Without this patch, mmc got hung_task and rebooted eventually.
With this patch applied, mmc returns CRC error instead of hung_task, and the error is handled gracefully.

Thanks,
Bing

> 
> Thanks,
> Seungwon Jeon

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