Return correct length from pmsgRead() am: 08660a811e am: 518f88a3e9
am: 32ffa56379

* commit '32ffa56379c41764fded658e52154a65aa120ec4':
  Return correct length from pmsgRead()

Change-Id: I82f1e9cd0edc008ac0b113e7eb149cb77a3f194c