linux-kernel - Re: [PATCH v5 3/4] mtd: core: protect access to MTD devices while in suspend

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Message-ID: <20211129101908.6f1aa715@xps13>
Date:   Mon, 29 Nov 2021 10:19:08 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Boris Brezillon <boris.brezillon@...labora.com>
Cc:     Sean Nyekjaer <sean@...nix.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/4] mtd: core: protect access to MTD devices while
 in suspend

Hi Sean,

boris.brezillon@...labora.com wrote on Tue, 23 Nov 2021 14:07:15 +0100:

> On Tue, 23 Nov 2021 13:50:12 +0100
> Sean Nyekjaer <sean@...nix.com> wrote:
> 
> > @Boris do we need to do something similar here to what we did with the
> > mtdconcat stuff?  
> 
> Absolutely, physmasp subdevices are never initialized/registered, so
> you can't call any of the mtd helpers taking the suspend lock on those.
> I guess it'd be better to call mtd_suspend/resume() on the concat device
> in though:

Any chance that you will come up with a fix or v6 of the series anytime
soon?

> 
> static void physmap_flash_shutdown(struct platform_device *dev)
> {
> 	struct physmap_flash_info *info = platform_get_drvdata(dev);
> 
> 	mtd_suspend(info->cmtd);
> }


Thanks,
Miquèl