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From:   Dave Airlie <airlied@gmail.com>
Date:   Thu, 4 Aug 2022 15:52:25 +1000
Message-ID: <CAPM=9txwzNZgUCJUTxww3hYmTnbrNH-2zdjxamxB4=yW9sFHxQ@mail.gmail.com>
Subject: Re: [git pull] drm for 5.20/6.0
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>,
        Daniel Wheeler <daniel.wheeler@amd.com>,
        Harry Wentland <Harry.Wentland@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        LKML <linux-kernel@vger.kernel.org>
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On Thu, 4 Aug 2022 at 15:25, Dave Airlie <airlied@gmail.com> wrote:
>
> On Thu, 4 Aug 2022 at 14:46, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > On Wed, Aug 3, 2022 at 9:27 PM Linus Torvalds
> > <torvalds@linux-foundation.org> wrote:
> > >
> > > I'll do a few more. It's close enough already that it should be just
> > > four more reboots to pinpoint exactly which commit breaks.
> >
> > commit 5d945cbcd4b16a29d6470a80dfb19738f9a4319f is the first bad commit.
> >
> > I think it's supposed to make no semantic changes, but it clearly does.
> >
> > What a pain to figure out what's wrong in there, and I assume it
> > doesn't revert cleanly either.
> >
> > Bringing in the guilty parties. See
> >
> >   https://lore.kernel.org/all/CAHk-=wj+yzauNXiEwHfCrkbdLSQkizdR1Q3YJLAqPo6AVq2_4Q@mail.gmail.com/
> >
> > for the beginning of this thread.
>
> I think I've tracked it down, looks like it would only affect GFX8
> cards, which might explain why you and I have seen it, and I haven't
> seen any other reports.
>
> pretty sure you have an rx580, and I just happen to have a fiji card
> in this machine right now.
>
> I'll retest on master and send you a fixup patch.

To close the loop

https://lore.kernel.org/all/20220804055036.691670-1-airlied@redhat.com/T/#u

Seems to fix it here.

Dave.