linux-kernel - Re: 5.11 new lockdep warning related to led-class code (also may involve ata / piix controller)

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Date:   Tue, 2 Feb 2021 10:32:29 +0100
From:   Pavel Machek <pavel@....cz>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Dan Murphy <dmurphy@...com>,
        linux-ide@...r.kernel.org, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: 5.11 new lockdep warning related to led-class code (also may
 involve ata / piix controller)

Hi!

> > Is it a regression? AFAIK it is a bug that has been there
> > forever... My original plan was to simply wait for 5.12, so it gets
> > full release of testing...
> 
> It may have been a pre-existing bug which got triggered by libata
> changes?

Fixes tag suggests it is rather old.

> I don't know. I almost always run all my locally build kernels with lockdep
> enabled and as the maintainer of the vboxvideo, vboxguest and vboxsf guest
> drivers in the mainline kernel I quite often boot local build kernels inside
> a vm.
> 
> So I believe that lockdep tripping over this is new in 5.11, which is why
> I called it a regression.
> 
> And the fix seems very safe and simple, so IMHO it would be good to get
> this into 5.11

It is in 5.11 now, and also -stable kernels. (Which suprised me a
bit).

Testing would be welcome.

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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