drm/i915: Split the ringbuffers from the rings (3/3)

Manual cleanup after the previous Coccinelle script.

Yes, I could write another Coccinelle script to do this but I
don't want labor-replacing robots making an honest programmer's
work obsolete (also, I'm lazy).

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 234d454..4e70de6 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -141,6 +141,7 @@
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv;
 	struct intel_engine_cs *ring = LP_RING(dev_priv);
+	struct intel_ringbuffer *ringbuf = ring->buffer;
 
 	/*
 	 * We should never lose context on the ring with modesetting
@@ -149,17 +150,17 @@
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		return;
 
-	ring->buffer->head = I915_READ_HEAD(ring) & HEAD_ADDR;
-	ring->buffer->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
-	ring->buffer->space = ring->buffer->head - (ring->buffer->tail + I915_RING_FREE_SPACE);
-	if (ring->buffer->space < 0)
-		ring->buffer->space += ring->buffer->size;
+	ringbuf->head = I915_READ_HEAD(ring) & HEAD_ADDR;
+	ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
+	ringbuf->space = ringbuf->head - (ringbuf->tail + I915_RING_FREE_SPACE);
+	if (ringbuf->space < 0)
+		ringbuf->space += ringbuf->size;
 
 	if (!dev->primary->master)
 		return;
 
 	master_priv = dev->primary->master->driver_priv;
-	if (ring->buffer->head == ring->buffer->tail && master_priv->sarea_priv)
+	if (ringbuf->head == ringbuf->tail && master_priv->sarea_priv)
 		master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 }