[Intel-gfx] [PATCH 25/28] drm/i915: Require object lock when freeing pages during destruction

Maarten Lankhorst
2021-10-21T10:37:23Z

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

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.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 1e426a42a36c..d549f34829d0 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -257,6 +257,8 @@ 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;

@@ -323,7 +325,10 @@ 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 */
--
2.33.0