On 26 April 2017 at 17:20, Christian König <deathsimple@xxxxxxxxxxx> wrote: > NAK, I'm wondering how often I have to reject that change. We should > probably add a comment here. > > Even with a zero timeout we still need to enable signaling, otherwise some > fence will never signal if userspace just polls on them. > > If a caller is only interested in the fence status without enabling the > signaling it should call dma_fence_is_signaled() instead. Can we not move the return 0 (with spin unlock) down after we enabling signalling, but before we enter the schedule_timeout(1)? Dave.
