[PATCH] drm/i915: Optimize the i915_gem_gtt_finish_object function

[armin.c.reese@intel.com]

From: Armin Reese <armin.c.reese@intel.com>

Signed-off-by: Armin Reese <armin.c.reese@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index afd4eef..7e2190e 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1624,18 +1624,17 @@ static void ggtt_unbind_vma(struct i915_vma *vma)
 
 void i915_gem_gtt_finish_object(struct drm_i915_gem_object *obj)
 {
-	struct drm_device *dev = obj->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	bool interruptible;
-
-	interruptible = do_idling(dev_priv);
+	if (!obj->has_dma_mapping) {
+		struct drm_device *dev = obj->base.dev;
+		struct drm_i915_private *dev_priv = dev->dev_private;
+		bool interruptible = do_idling(dev_priv);
 
-	if (!obj->has_dma_mapping)
 		dma_unmap_sg(&dev->pdev->dev,
 			     obj->pages->sgl, obj->pages->nents,
 			     PCI_DMA_BIDIRECTIONAL);
 
-	undo_idling(dev_priv, interruptible);
+		undo_idling(dev_priv, interruptible);
+	}
 }
 
 static void i915_gtt_color_adjust(struct drm_mm_node *node,
-- 
1.9.1