Merge SPL 2020-12-05 into mp-release

* origin/8901-fp3-q-mp-release-spl-202012:
  do_epoll_ctl(): clean the failure exits up a bit
  epoll: Keep a reference on files added to the check list
  HID: core: Sanitize event code and type when mapping input
  HID: core: Correctly handle ReportSize being zero
Change-Id: I533580ddfbdaee85368fdf5dca4260ff6cd7a054