[PATCH 4/9] drm/i915: Push i915_sw_fence_wait into the nonblocking atomic commit

[Chris Wilson]

Quoting Daniel Vetter (2017-07-19 13:54:57)
> Blocking in a worker is ok, 

but needlessly inefficient,

> that's what the unbound_wq is for. And it
> unifies the paths between the blocking and nonblocking commit, giving
> me just one path where I have to implement the deadlock avoidance
> trickery in the next patch.

For reference, I did that the other way by moving it all over to fences.
-Chris