We should never be called via obj->ops->release() on anything other than
a fully formed stolen object, so raise that to an assert. In the process
tidy up a comment and variable no longer used outside of a conditional
BUG.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_stolen.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c
b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 9b182ed93f3e..5bc9f699fdd2 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -513,11 +513,10 @@ i915_pages_create_for_stolen(struct drm_device *dev,
u32 offset, u32 size)
{
struct drm_i915_private *dev_priv = to_i915(dev);
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
struct sg_table *st;
struct scatterlist *sg;
- GEM_BUG_ON(offset > ggtt->stolen_size - size);
+ GEM_BUG_ON(offset > dev_priv->ggtt.stolen_size - size);
/* We hide that we have no struct page backing our stolen object
* by wrapping the contiguous physical allocation with a fake
@@ -554,7 +553,7 @@ i915_gem_object_get_pages_stolen(struct drm_i915_gem_object
*obj)
static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj,
struct sg_table *pages)
{
- /* Should only be called during free */
+ /* Should only be called from i915_gem_object_release_stolen() */
sg_free_table(pages);
kfree(pages);
}
@@ -563,15 +562,16 @@ static void
i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
{
struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+ struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen);
+
+ GEM_BUG_ON(!stolen);
__i915_gem_object_unpin_pages(obj);
- if (obj->stolen) {
- i915_gem_stolen_remove_node(dev_priv, obj->stolen);
- kfree(obj->stolen);
- obj->stolen = NULL;
- }
+ i915_gem_stolen_remove_node(dev_priv, stolen);
+ kfree(stolen);
}
+
static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = {
.get_pages = i915_gem_object_get_pages_stolen,
.put_pages = i915_gem_object_put_pages_stolen,
--
2.10.2
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