drm/radeon/kms: take vram mutex pointer before derefing object. (f4b7fb94) · Commits · 戴 / test

drivers/gpu/drm/radeon/radeon_object.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -168,13 +168,15 @@ void radeon_bo_kunmap(struct radeon_bo *bo)
		void radeon_bo_unref(struct radeon_bo **bo)
		{
		struct ttm_buffer_object *tbo;
		struct radeon_device *rdev;

		if ((*bo) == NULL)
		return;
		rdev = (*bo)->rdev;
		tbo = &((*bo)->tbo);
		mutex_lock(&(*bo)->rdev->vram_mutex);
		mutex_lock(&rdev->vram_mutex);
		ttm_bo_unref(&tbo);
		mutex_unlock(&(*bo)->rdev->vram_mutex);
		mutex_unlock(&rdev->vram_mutex);
		if (tbo == NULL)
		*bo = NULL;
		}