From: Kristian Høgsberg <krh@bitplanet.net>
Date: Wed, 11 Nov 2009 17:19:18 +0000 (-0500)
Subject: drm/i915: Disable pwrctx before unpin and free
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c1b5dea097258b3d3d570d5ccc8f4bf5accb3f29;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

drm/i915: Disable pwrctx before unpin and free

Otherwise the chip may scribble over free memory.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index abd24e2a4932..d2519f0136ef 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4588,6 +4588,11 @@ void intel_modeset_cleanup(struct drm_device *dev)
 		dev_priv->display.disable_fbc(dev);
 
 	if (dev_priv->pwrctx) {
+		struct drm_i915_gem_object *obj_priv;
+
+		obj_priv = dev_priv->pwrctx->driver_private;
+		I915_WRITE(PWRCTXA, obj_priv->gtt_offset &~ PWRCTX_EN);
+		I915_READ(PWRCTXA);
 		i915_gem_object_unpin(dev_priv->pwrctx);
 		drm_gem_object_unreference(dev_priv->pwrctx);
 	}