OK, what isn't clear to me is what the proper return value is in this
case. In particular, how with the caller react to mc_sysdev_add()
returning a nonzero value, but still have the sysdev devices created and
retained?
What I would expect happen would be that sysdev_register_driver() would
return an error and we would unregister the notifier, which really isn't
the right thing -- if the intent is to keep the sysdev devices around
for a possible later update then we should presumably return zero there,
i.e. ignore the return value from microcode_init_cpu(); completely?
-hpa
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