C
> ; Gupta, Anshuman
> ; Ursulin, Tvrtko ;
> Jana, Mousumi
> Subject: [PATCH v5 2/3] drm/i915/guc: Close deregister-context race against
> CT-loss
>
> If we are at the end of suspend or very early in resume its possible an async
> fence signal (via rcu_call) is trigge
If we are at the end of suspend or very early in resume
its possible an async fence signal (via rcu_call) is triggered
to free_engines which could lead us to the execution of
the context destruction worker (after a prior worker flush).
Thus, when suspending, insert rcu_barriers at the start
of i91
