commit b38b53fb2ea072afb188bd1f7982399e42267a5c
author Shuzhen Wang <shuzhenwang@google.com> Thu Jul 15 12:46:09 2021 -0700
committer Shuzhen Wang <shuzhenwang@google.com> Thu Jul 15 15:46:31 2021 -0700
tree 95f48e4d364f642b1c631dd01b436fe5f1f0baab
parent 2a3ca76a06be240fa4f0d09353cec3424e38a518

Camera: Fix race condition for filterSPerfClassCharacteristics

1. enumerateProviders may be called from different threads: from
  cameraserver startup, and from the provider's onRegistration.
  When enumerateProviders calls filterSPerfClassCharacteristics,
  mServiceLock needs to be held.
2. onRegistration can be called with preexisting set to TRUE. In that
  case, do not call onNewProviderRegistered() to avoid unnecessary
  enumerateProviders.

Test: vendor testing, camera CTS
Bug: 193796282
Change-Id: I596a047cb36a9926014de232a6639a32da4f214c