[PATCH 5/6] drm/i915: Assert the drm_mm_node is allocated when on the VM lists

[Chris Wilson <chris@chris-wilson.co.uk>]

Before moving the vma between the VM active/inactive lists, assert that
the node is still allocated.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_stolen.c | 2 ++
 drivers/gpu/drm/i915/i915_vma.c        | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 61cc0fcae3d8..127d698e7c84 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -702,6 +702,8 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv
 		goto err_pages;
 	}
 
+	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
+
 	vma->pages = obj->mm.pages;
 	vma->flags |= I915_VMA_GLOBAL_BIND;
 	__i915_vma_set_map_and_fenceable(vma);
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index e58d8799bee2..ecb495b1c5d3 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -45,6 +45,7 @@ i915_vma_retire(struct i915_gem_active *active,
 	if (i915_vma_is_active(vma))
 		return;
 
+	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
 	list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
 	if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
 		WARN_ON(i915_vma_unbind(vma));
@@ -493,6 +494,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 		GEM_BUG_ON(vma->node.start < start);
 		GEM_BUG_ON(vma->node.start + vma->node.size > end);
 	}
+	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
 	GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));
 
 	list_move_tail(&obj->global_link, &dev_priv->mm.bound_list);
-- 
2.11.0

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