linux-kernel - Re: Regression in next with spi return from transfer

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Message-ID: <20181115221241.GQ2089@sirena.org.uk>
Date:   Thu, 15 Nov 2018 14:12:41 -0800
From:   Mark Brown <broonie@...nel.org>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Lubomir Rintel <lkundrak@...sk>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org
Subject: Re: Regression in next with spi return from transfer_one()

On Thu, Nov 15, 2018 at 01:14:51PM -0800, Tony Lindgren wrote:

> Commit 810923f3bf06 ("spi: Deal with slaves that return from
> transfer_one() unfinished") causes a regression at least on
> droid 4 with SPI PMIC and regulators on the PMIC. During boot
> the device just hangs there waiting for rootfs to appear on
> MMC. Reverting 810923f3bf06 makes things work again.

> Any ideas why this might be?

Wow, that's not obvious...  as far as I can tell the code in the !slave
case is identical so unless the controller is somehow getting mistakenly
flagged as a slave it looks like it should be something to do with it
being pushed into a function.  Could you try logging what the timeout
ends up getting set to?

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