linux-kernel - [PATCH 3.12 34/40] drm/i915: Undo gtt scratch pte unmapping again

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Message-Id: <f90bec2a0b2107c1c841621d1deacc84bb6c92f3.1396469191.git.jslaby@suse.cz>
Date:	Wed,  2 Apr 2014 22:13:20 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Takashi Iwai <tiwai@...e.de>,
	Paulo Zanoni <paulo.r.zanoni@...el.com>,
	Todd Previte <tprevite@...il.com>,
	Dave Airlie <airlied@...hat.com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 34/40] drm/i915: Undo gtt scratch pte unmapping again

From: Daniel Vetter <daniel.vetter@...ll.ch>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8ee661b505613ef2747b350ca2871a31b3781bee upstream.

It apparently blows up on some machines. This functionally reverts

commit 828c79087cec61eaf4c76bb32c222fbe35ac3930
Author: Ben Widawsky <benjamin.widawsky@...el.com>
Date:   Wed Oct 16 09:21:30 2013 -0700

    drm/i915: Disable GGTT PTEs on GEN6+ suspend

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64841
Reported-and-Tested-by: Brad  Jackson <bjackson0971@...il.com>
Cc: Takashi Iwai <tiwai@...e.de>
Cc: Paulo Zanoni <paulo.r.zanoni@...el.com>
Cc: Todd Previte <tprevite@...il.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 1f7b4caefb6e..c7fa2e420d49 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -536,7 +536,7 @@ void i915_gem_suspend_gtt_mappings(struct drm_device *dev)
 	dev_priv->gtt.base.clear_range(&dev_priv->gtt.base,
 				       dev_priv->gtt.base.start / PAGE_SIZE,
 				       dev_priv->gtt.base.total / PAGE_SIZE,
-				       false);
+				       true);
 }
 
 void i915_gem_restore_gtt_mappings(struct drm_device *dev)
-- 
1.9.1

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