[Intel-gfx] [PATCH] drm/i915: Fix preallocated barrier list append

[Chris Wilson]

Quoting José Roberto de Souza (2020-01-29 23:23:45)
> Only the first and the last nodes were being added to
> ref->preallocated_barriers.
> 
> I'm not familiar with this part of the code but if that is the
> expected behavior it is leaking the nodes in between.

Fortunately only used with a maximum of a pair of engines.
-Chris