tree 75a5f011edf8a5773b689abcc836a99a3e10744d
parent 731609c65813fea4ef19460173b84faa57baa6f1
author Eino-Ville Talvala <etalvala@google.com> 1414012872 -0700
committer The Android Automerger <android-build@google.com> 1414023382 -0700

CameraService: Disconnect: Release mutex while waiting for joins.

The threads shutting down may have callpaths that require taking the
binder interface mutex, so waiting to join them with that mutex held
can lead to deadlocks.

A specific instance is StreamingProcessor calling dataCallbackTimestamp,
which can immediately lead to a Camera2Client::releaseRecordingFrame call,
which requires the binder interface mutex. If this call happens right when
shutdown is occurring, and Camera2Client::disconnect is holding the mutex,
deadlock ensues.

Bug: 17997578
Change-Id: I71253cd5542b5920ad205976d315110ca0043d94