am 8b28441a: Merge "Being already unmounted is not a failure" into gingerbread

Merge commit '8b28441adab59f2bb0d92c8a717af75331249e08' into gingerbread-plus-aosp

* commit '8b28441adab59f2bb0d92c8a717af75331249e08':
  Being already unmounted is not a failure