Re: [PATCH] Revert "drm/amdgpu: fix vblank_time when displays are off"

['Greg KH' <gregkh@linuxfoundation.org>]

On Fri, Aug 18, 2017 at 04:41:55PM +0000, Deucher, Alexander wrote:
> > -----Original Message-----
> > From: Greg KH [mailto:gregkh@linuxfoundation.org]
> > Sent: Friday, August 18, 2017 12:31 PM
> > To: Alex Deucher
> > Cc: for 3.8; Deucher, Alexander
> > Subject: Re: [PATCH] Revert "drm/amdgpu: fix vblank_time when displays
> > are off"
> > 
> > On Fri, Aug 18, 2017 at 12:22:53PM -0400, Alex Deucher wrote:
> > > On Fri, Aug 18, 2017 at 12:16 PM, Greg KH <gregkh@linuxfoundation.org>
> > wrote:
> > > > On Thu, Aug 17, 2017 at 04:36:51PM -0400, Alex Deucher wrote:
> > > >> This reverts commit 2dc1889ebf8501b0edf125e89a30e1cf3744a2a7.
> > > >>
> > > >> Fixes a suspend and resume regression.
> > > >>
> > > >> bug: https://bugzilla.kernel.org/show_bug.cgi?id=196615
> > > >> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> > > >> Cc: <stable@vger.kernel.org> # 4.12.x
> > > >> ---
> > > >>  drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 2 --
> > > >>  1 file changed, 2 deletions(-)
> > > >
> > > > What is the git commit id of this patch in Linus's tree?
> > >
> > > This patch was not reverted from Linus' tree. This is just a revert of
> > > this patch from the 4.12 stable tree.  The patch works fine in Linus
> > > tree, but causes a regression in 4.12.  The original patch in Linus'
> > > tree was:
> > > beb3777682d5c296cc15a2a424f5a7a98476def0
> > > which was backported to 4.12 as:
> > > 2dc1889ebf8501b0edf125e89a30e1cf3744a2a7
> > > and I'd now like to revert just the backport.
> > 
> > Why does the backport need to be reverted as it works properly in
> > Linus's tree?  Are we missing something else in 4.12-stable?  This seems
> > very odd...
> 
> Presumably we are missing some other patch from master that is not in
> stable.  I haven't had time to dig further.

Hm, ok, I guess I can just drop this...