✗ Fi.CI.BAT: failure for drm/i915/gem: Wait until the context is finally retired before releasing engines (rev3)

[Chris Wilson]

Quoting Patchwork (2020-03-23 18:09:52)
> #### Possible regressions ####
> 
>   * igt at gem_busy@busy-all:
>     - fi-icl-guc:         [PASS][1] -> [INCOMPLETE][2]
>    [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8180/fi-icl-guc/igt@gem_busy@busy-all.html
>    [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17058/fi-icl-guc/igt@gem_busy@busy-all.html

uaf, the dilemma of how to order the wake-up vs the retire callback.
-Chris