From 9500986159d9017f9277f9e42a1f9b13b5e0e666 Mon Sep 17 00:00:00 2001
From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date: Wed, 5 Nov 2014 17:30:52 +0200
Subject: [PATCH] Revert "drm/i915/vlv: Remove check for Old Ack during
 forcewake"
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This reverts commit 5cb13c07dae73380d8b3ddc792740487b8742938.

While the relevance for WaRsDontPollForAckOnClearingFWBits is under
investigation, revert this as regression.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85684
Tested-by:   Tested-by: lu hua <huax.lu@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: S, Deepak <deepak.s@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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