Quoting Michal Wajdeczko (2018-10-11 13:19:51)
> In case of the error we missed to call i915_mmio_cleanup
> that matches earlier call to i915_mmio_setup.

True, doesn't look fatal atm; worst being we left the register bar mmapped
(which would be ok as we map it again using the same constraints on next
load) and left the mchbar flagged as active (if we enabled it on
i915/i965).

We should pair this with a patch to add a i915_inject_load_failure() to
intel_engine_init_mmio.
 
> Signed-off-by: Michal Wajdeczko <[email protected]>
> Cc: Joonas Lahtinen <[email protected]>
> Cc: Chris Wilson <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
-Chris
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