[PATCH] drm/i915/ring_submission: Fix timeline left held on VMA alloc error

[Krzysztof Karas]

Hi Janusz,

[...]
> If successful then that function, or its execlists or GuC submission
> equivalent, is supposed to be called only once per GEM context engine,
Could you clarify "execlists or GuC submission equivalent" here
- do these functions perform similar reference acquisition,
which may be lost along with some other data? Should they also
be modified to avoid similar problems in the future?

Best Regards,
Krzysztof