Well I've found a minor bug in TTM (false positive warning), but was never able to reproduce this issue. What hardware generation did you use for testing? Christian. Am 25.10.2017 um 17:54 schrieb Michel Dänzer: > On 25/10/17 05:51 PM, Christian König wrote: >> Going to take a look tomorrow. > Thanks. > > FWIW, it's the line at drivers/dma-buf/reservation.c:485: > > if (!fence && wait_all) { > struct reservation_object_list *fobj = > rcu_dereference(obj->fence); > > if (fobj) > shared_count = fobj->shared_count; <=== > >