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

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Message-ID: <20180214202454.6e7ebeaf@naga.suse.cz>
Date:   Wed, 14 Feb 2018 20:24:54 +0100
From:   Michal Suchánek <msuchanek@...e.de>
To:     Stefan Wahren <stefan.wahren@...e.com>
Cc:     Phil Elwell <phil@...pberrypi.org>,
        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 17:49:31 +0100
Stefan Wahren <stefan.wahren@...e.com> wrote:

> Hi Michal,
> 
> [add Phil]
> 
> Am 14.02.2018 um 17:13 schrieb Michal Suchánek:
> > 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.  
> 
> do you noticed this issue before 4.15-rc4?

I initially noticed it with 4.4 kernel with some backports to make it
bootable on RPi.
> 
> Could you please test with 4.15 final again?

Right, I can apply the patches on something more recent.

> 
> What kind of SD card (name) triggers the issue?

Samsung EVO MB-MP16D

Also see https://elinux.org/RPi_SD_cards#Which_SD_card.3F

Thanks

Michal