linux-kernel - Re: [Nouveau] [regression drm/noveau] suspend to ram -> BOOM: exception RIP: drm_calc_vbltimestamp_from

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Date:   Fri, 14 Jul 2017 17:55:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ilia Mirkin <imirkin@...m.mit.edu>
Cc:     Tobias Klausmann <tobias.johannes.klausmann@....thm.de>,
        Karol Herbst <karolherbst@...il.com>,
        Mike Galbraith <efault@....de>,
        David Airlie <airlied@...ux.ie>,
        "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [Nouveau] [regression drm/noveau] suspend to ram -> BOOM:
 exception RIP: drm_calc_vbltimestamp_from_scanoutpos+335

On Fri, Jul 14, 2017 at 11:20:01AM -0400, Ilia Mirkin wrote:
> On Fri, Jul 14, 2017 at 11:19 AM, Tobias Klausmann
> <tobias.johannes.klausmann@....thm.de> wrote:
> > The conversion is a nice catch, but i'd like to have a bit more context, see
> > below!
> >
> > With a better description:
> >
> > Tobias Klausmann <tobias.johannes.klausmann@....thm.de>
> 
> I don't think it was meant as a serious patch. WARN_ON_ONCE should
> work. The fix isn't to remove all instances of WARN_ON_ONCE. The fix
> is to fix WARN_ON_ONCE.

Quite so. Clearly I buggered it for modules; that really wasn't the
plan.