linux-kernel - Re: [PATCH v1 0/3] introduce priority-based shutdown support

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Date:   Thu, 30 Nov 2023 22:59:09 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Christian Loehle <christian.loehle@....com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>, linux-pm@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>, kernel@...gutronix.de,
        Søren Andersen <san@...v.dk>
Subject: Re: [PATCH v1 0/3] introduce priority-based shutdown support

Hello all,

On Mon, Nov 27, 2023 at 12:36:11PM +0100, Oleksij Rempel wrote:
> On Mon, Nov 27, 2023 at 10:13:49AM +0000, Christian Loehle wrote:
> > > Same problem was seen not only in automotive devices, but also in
> > > industrial or agricultural. With other words, it is important enough to bring
> > > some kind of solution mainline.
> > > 
> > 
> > IMO that is a serious problem with the used storage / eMMC in that case and it
> > is not suitable for industrial/automotive uses?
> > Any industrial/automotive-suitable storage device should detect under-voltage and
> > just treat it as a power-down/loss, and while that isn't nice for the storage device,
> > it really shouldn't be able to brick a device (within <1M cycles anyway).
> > What does the storage module vendor say about this?
> 
> Good question. I do not have insights ATM. I'll forward it.

>From personal experience I can tell that bricked eMMC devices happen because of
eMMC controller firmware bugs. You might find some recently committed quirk
on this regard.

Waiting for any additional details you might be able to find, given my past
experience I would agree with what Christian wrote.

Francesco