linux-kernel - Re: [PATCH 1/2] mmc: bcm2835: reset host on timeout

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Date:   Wed, 14 Feb 2018 16:58:27 +0100
From:   Michal Suchánek <msuchanek@...e.de>
To:     Stefan Wahren <stefan.wahren@...e.com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>,
        Gerd Hoffmann <kraxel@...hat.com>,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Julia Lawall <Julia.Lawall@...6.fr>, linux-mmc@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mmc: bcm2835: reset host on timeout

On Wed, 14 Feb 2018 16:36:49 +0100
Michal Suchánek <msuchanek@...e.de> wrote:

> On Wed, 14 Feb 2018 15:58:31 +0100
> Stefan Wahren <stefan.wahren@...e.com> wrote:
> 
> > Hi Michal,
> > 
> > Am 14.02.2018 um 15:38 schrieb Michal Suchanek:  
> > > The bcm2835 mmc host tends to lock up for unknown reason so reset
> > > it on timeout. The upper mmc block layer tries retransimitting
> > > with single blocks which tends to work out after a long wait.
> > >
> > > This is better than giving up and leaving the machine broken for
> > > no obvious reason.    
> > 
> > could you please provide more information about this issue (affected
> > hardware, kernel config, version, dmesg, reproducible scenario)?
> >   
> 

It tends to reproduce when upgrading a few packages with zypper and
otherwise at random during system operation. It seems that for my card
it worsens with age to some degree so perhaps it depends on the
fragmentation of the internal card flash.

Attaching dmesg and kernel config.

Thanks

Michal

View attachment "config.txt" of type "text/plain" (212685 bytes)

View attachment "dmesg.txt" of type "text/plain" (29779 bytes)