drm/i915: Add vma to list at creation

With the current code there shouldn't be a distinction - however with an
upcoming change we intend to allocate a vma much earlier, before it's
actually bound anywhere.

To do this we have to check node allocation as well for the _bound()
check.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: move list_del(&vma->vma_link) from vma_unbind to vma_destroy,
again fallout from the loss of "rm/i915: Cleanup more of VMA in
destroy".]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

fixup for drm/i915: Add vma to list at creation

drivers/gpu/drm/i915/i915_gem.c

@@ -2642,7 +2642,6 @@ int i915_vma_unbind(struct i915_vma *vma)
 	if (i915_is_ggtt(vma->vm))
 		obj->map_and_fenceable = true;
 
-	list_del(&vma->vma_link);
 	drm_mm_remove_node(&vma->node);
 	i915_gem_vma_destroy(vma);
 
@@ -3186,12 +3185,6 @@ search_free:
 	list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
 	list_add_tail(&vma->mm_list, &vm->inactive_list);
 
-	/* Keep GGTT vmas first to make debug easier */
-	if (i915_is_ggtt(vm))
-		list_add(&vma->vma_link, &obj->vma_list);
-	else
-		list_add_tail(&vma->vma_link, &obj->vma_list);
-
 	fenceable =
 		i915_is_ggtt(vm) &&
 		i915_gem_obj_ggtt_size(obj) == fence_size &&
@@ -4074,12 +4067,19 @@ struct i915_vma *i915_gem_vma_create(struct drm_i915_gem_object *obj,
 	vma->vm = vm;
 	vma->obj = obj;
 
+	/* Keep GGTT vmas first to make debug easier */
+	if (i915_is_ggtt(vm))
+		list_add(&vma->vma_link, &obj->vma_list);
+	else
+		list_add_tail(&vma->vma_link, &obj->vma_list);
+
 	return vma;
 }
 
 void i915_gem_vma_destroy(struct i915_vma *vma)
 {
 	WARN_ON(vma->node.allocated);
+	list_del(&vma->vma_link);
 	kfree(vma);
 }
 
@@ -4767,7 +4767,7 @@ bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &o->vma_list, vma_link)
-		if (vma->vm == vm)
+		if (vma->vm == vm && drm_mm_node_allocated(&vma->node))
 			return true;
 
 	return false;