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Date:   Tue, 14 Apr 2020 10:21:50 +0200
From:   Greg KH <greg@...ah.com>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Paul Menzel <pmenzel@...gen.mpg.de>,
        Prike Liang <Prike.Liang@....com>,
        Alex Deucher <alexander.deucher@....com>,
        regressions@...mhuis.info, David Airlie <airlied@...ux.ie>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "for 3.8" <stable@...r.kernel.org>, Huang Rui <ray.huang@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Mengbing Wang <Mengbing.Wang@....com>
Subject: Re: [regression 5.7-rc1] System does not power off, just halts

On Mon, Apr 13, 2020 at 01:48:58PM -0400, Alex Deucher wrote:
> On Mon, Apr 13, 2020 at 1:47 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
> >
> > Dear Prike, dear Alex, dear Linux folks,
> >
> >
> > Am 13.04.20 um 10:44 schrieb Paul Menzel:
> >
> > > A regression between causes a system with the AMD board MSI B350M MORTAR
> > > (MS-7A37) with an AMD Ryzen 3 2200G not to power off any more but just
> > > to halt.
> > >
> > > The regression is introduced in 9ebe5422ad6c..b032227c6293. I am in the
> > > process to bisect this, but maybe somebody already has an idea.
> >
> > I found the Easter egg:
> >
> > > commit 487eca11a321ef33bcf4ca5adb3c0c4954db1b58
> > > Author: Prike Liang <Prike.Liang@....com>
> > > Date:   Tue Apr 7 20:21:26 2020 +0800
> > >
> > >     drm/amdgpu: fix gfx hang during suspend with video playback (v2)
> > >
> > >     The system will be hang up during S3 suspend because of SMU is pending
> > >     for GC not respose the register CP_HQD_ACTIVE access request.This issue
> > >     root cause of accessing the GC register under enter GFX CGGPG and can
> > >     be fixed by disable GFX CGPG before perform suspend.
> > >
> > >     v2: Use disable the GFX CGPG instead of RLC safe mode guard.
> > >
> > >     Signed-off-by: Prike Liang <Prike.Liang@....com>
> > >     Tested-by: Mengbing Wang <Mengbing.Wang@....com>
> > >     Reviewed-by: Huang Rui <ray.huang@....com>
> > >     Signed-off-by: Alex Deucher <alexander.deucher@....com>
> > >     Cc: stable@...r.kernel.org
> >
> > It reverts cleanly on top of 5.7-rc1, and this fixes the issue.
> >
> > Greg, please do not apply this to the stable series. The commit message
> > doesn’t even reference a issue/bug report, and doesn’t give a detailed
> > problem description. What system is it?
> >
> > Dave, Alex, how to proceed? Revert? I created issue 1094 [1].
> 
> Already fixed:
> https://patchwork.freedesktop.org/patch/361195/

Any reason that doesn't have a cc: stable tag on it?

And is it committed to any tree at the moment?

thanks,

greg k-h

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