Re: WTF: patch "[PATCH] drm/i915: Fix init_clock_gating for resume" was seriously submitted to be applied to the 4.14-stable tree?

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Dec 04, 2017 at 02:54:31PM +0200, Ville Syrj�l� wrote:
> On Mon, Dec 04, 2017 at 01:36:08PM +0100, gregkh@linuxfoundation.org wrote:
> > The patch below was submitted to be applied to the 4.14-stable tree.
> > 
> > I fail to see how this patch meets the stable kernel rules as found at
> > Documentation/process/stable-kernel-rules.rst.
> 
> It fixes a regression. Why do you think it's not suitable for stable?

Because:

> > I could be totally wrong, and if so, please respond to 
> > <stable@vger.kernel.org> and let me know why this patch should be
> > applied.  Otherwise, it is now dropped from my patch queues, never to be
> > seen again.
> > 
> > thanks,
> > 
> > greg k-h
> > 
> > ------------------ original commit in Linus's tree ------------------
> > 
> > >From 3572f04c69ed4369da5d3c65d84fb18774aa60b6 Mon Sep 17 00:00:00 2001
> > From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
> > Date: Thu, 16 Nov 2017 18:02:15 +0200
> > Subject: [PATCH] drm/i915: Fix init_clock_gating for resume
> > MIME-Version: 1.0
> > Content-Type: text/plain; charset=UTF-8
> > Content-Transfer-Encoding: 8bit
> > 
> > Moving the init_clock_gating() call from intel_modeset_init_hw() to
> > intel_modeset_gem_init() had an unintended effect of not applying
> > some workarounds on resume. This, for example, cause some kind of
> > corruption to appear at the top of my IVB Thinkpad X1 Carbon LVDS
> > screen after hibernation. Fix the problem by explicitly calling
> > init_clock_gating() from the resume path.
> > 
> > I really hope this doesn't break something else again. At least
> > the problems reported at https://bugs.freedesktop.org/show_bug.cgi?id=103549
> > didn't make a comeback, even after a hibernate cycle.
> > 
> > v2: Reorder the init_clock_gating vs. modeset_init_hw to match
> >     the display reset path (Rodrigo)
> > 
> > Cc: stable@vger.kernel.org
> > Cc: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > Fixes: 6ac43272768c ("drm/i915: Move init_clock_gating() back to where it was")

$ git describe --contains 6ac43272768c
v4.15-rc1~19^2~13^2~1

How is this a 4.14 regression?

thanks,

greg k-h