linux-kernel - Re: [PATCH] mmc: dw_mmc: Wait for data transfer after response errors

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Message-ID: <CAD=FV=WPKV78=Wx5qE43+LsVpx_X9KAfKvcXKWy2hZfDoRLi0w@mail.gmail.com>
Date:	Tue, 26 May 2015 13:44:33 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Alim Akhtar <alim.akhtar@...il.com>
Cc:	Jaehoon Chung <jh80.chung@...sung.com>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Sonny Rao <sonnyrao@...omium.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Addy Ke <addy.ke@...k-chips.com>,
	Alexandru Stan <amstan@...omium.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Chris Zhong <zyw@...k-chips.com>,
	Caesar Wang <wxt@...k-chips.com>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: dw_mmc: Wait for data transfer after response errors

Alim,

On Tue, May 26, 2015 at 11:02 AM, Alim Akhtar <alim.akhtar@...il.com> wrote:
> Hi Doug,
> On peach-pi, I got a hung task once in 4 cold boot as [1].

OK, I'll have to get my peach-pi or peach-pit up and running again.  I
ran out of desk space and I haven't gotten it set back up.  :(

I've been testing on an rk3288-based device.  Past experience has
taught me that the rk3288 dw_mmc works differently than the exynos
one, so perhaps this is a difference.

Could you possibly patch in something like
<https://chromium-review.googlesource.com/#/c/244347/> and provide the
console for the failure?  I'll put it on my list to try this myself,
too


> I was checking on v4.1-rc5, git hash as below:
>
> 862e58a mmc: dw_mmc: Wait for data transfer after response errors
> ba155e2 Linux 4.1-rc5
> 5b13966
>
> Not sure if I missed any dependent patch??

I'm currently testing out of tree, but my dw_mmc is very close to mainline.


> Have not checked the dw TRM for this change, will do that as soon as I
> get access to it.

OK, sounds good.  I have some old version of the DesignWare TRM, so
possibly something is different in the newer one...


-Doug
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