drm/i915: Tidy i915_gem_valid_gtt_space()

		vma->flags &= ~I915_VMA_CAN_FENCE;

}

bool i915_gem_valid_gtt_space(struct i915_vma *vma,

			      unsigned long cache_level)

static bool color_differs(struct drm_mm_node *node, unsigned long color)

{

	struct drm_mm_node *gtt_space = &vma->node;

	return node->allocated && node->color != color;

}

bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level)

{

	struct drm_mm_node *node = &vma->node;

	struct drm_mm_node *other;

	/*

	if (vma->vm->mm.color_adjust == NULL)

		return true;

	if (!drm_mm_node_allocated(gtt_space))

		return true;

	if (list_empty(&gtt_space->node_list))

		return true;

	/* Only valid to be called on an already inserted vma */

	GEM_BUG_ON(!drm_mm_node_allocated(node));

	GEM_BUG_ON(list_empty(&node->node_list));

	other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);

	if (other->allocated && !other->hole_follows && other->color != cache_level)

	other = list_prev_entry(node, node_list);

	if (color_differs(other, cache_level) && !other->hole_follows)

		return false;

	other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);

	if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)

	other = list_next_entry(node, node_list);

	if (color_differs(other, cache_level) && !node->hole_follows)

		return false;

	return true;