tree 720e6c361955149385338b5a7b452bce2b44dd7d
parent 2e4f425995f572623aa150d543e0b0edb2d138cb
author Paul Crowley <paulcrowley@google.com> 1540940364 -0700
committer Paul Crowley <paulcrowley@google.com> 1541198883 -0700

Wait for dm device to be ready before format

It can sometimes take a moment for the dm-device to appear after
creation, causing operations on it such as formatting to fail.
Ensure the device exists before create_crypto_blk_dev returns.

Test: adb sm set-virtual-disk true and format as adoptable.
Bug: 117586466
Change-Id: Id8f571b551f50fc759e78d917e4ac3080e926722