[PATCH 7/7] drm/i915: Require object lock when freeing pages during destruction

[Matthew Auld]

From: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

TTM already requires this, and we require it for delayed destroy.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 591ee3cb7275..b129ccb31e38 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -260,6 +260,8 @@ static void __i915_gem_object_free_mmaps(struct drm_i915_gem_object *obj)
  */
 void __i915_gem_object_pages_fini(struct drm_i915_gem_object *obj)
 {
+	assert_object_held(obj);
+
 	if (!list_empty(&obj->vma.list)) {
 		struct i915_vma *vma;
 
@@ -326,7 +328,10 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
 			obj->ops->delayed_free(obj);
 			continue;
 		}
+
+		i915_gem_object_lock(obj, NULL);
 		__i915_gem_object_pages_fini(obj);
+		i915_gem_object_unlock(obj);
 		__i915_gem_free_object(obj);
 
 		/* But keep the pointer alive for RCU-protected lookups */
-- 
2.31.1