TBM_RETURN_VAL_IF_FAIL(backend, TBM_ERROR_INVALID_OPERATION);
TBM_RETURN_VAL_IF_FAIL(backend->bo_unmap, TBM_ERROR_NOT_SUPPORTED);
- ret = bo->bufmgr->backend->bo_unmap(bo);
+ ret = backend->bo_unmap(bo);
if (!ret)
error = TBM_ERROR_INVALID_OPERATION;
else