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FB hub intr is enabled on finzalize_poweron and disabled on prepare_poweroff. There is no need to additionally disable FB hub intr in fault info mem destroy when driver refcount becomes zero since prepare_poweroff has already been called. Also prepare_poweroff locks GPU registers from CPU access so these registers should not be accessed after prepare_poweroff. Bug 200427479 Change-Id: I62c355502ea494a1d0528c8668cae63743b8957b Signed-off-by: Aparna Das <aparnad@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1776386 Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com> Reviewed-by: Deepak Nibade <dnibade@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Richard Zhao <rizhao@nvidia.com> Reviewed-by: Nirav Patel <nipatel@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>