From: Thomas Hellström <thomas.hellst...@intel.com>
In a ww transaction where we've already locked a reservation
object, assert_object_held() might not throw a splat even if
the object is unlocked. Improve on that situation by asserting
that the reservation object's ww mutex is indeed locked.
Signed-off-by: Thomas Hellström <thomas.hellst...@intel.com>
Cc: Matthew Auld <matthew.a...@intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_object.h | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h
b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index d0cc62d1c65e..d56643b3b518 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -117,7 +117,14 @@ i915_gem_object_put(struct drm_i915_gem_object *obj)
__drm_gem_object_put(&obj->base);
}
-#define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)
+#ifdef CONFIG_LOCKDEP
+#define assert_object_held(obj) do { \
+ dma_resv_assert_held((obj)->base.resv); \
+ WARN_ON(!ww_mutex_is_locked(&(obj)->base.resv->lock)); \
+ } while (0)
+#else
+#define assert_object_held(obj) do { } while (0)
+#endif
#define object_is_isolated(obj) \
(!IS_ENABLED(CONFIG_LOCKDEP) || \
--
2.26.2
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