On 26 April 2017 at 17:20, Christian König deathsimple@vodafone.de 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.