Comment 2 for bug 1416314

Based on my investigation, I did not find any issue on cinder side. In a situation of failed migration, the volume is properly unmapped from the host and the terminate_connection has been called as expected.
I rebooted the vm after failed migration to make sure LUNs are properly mapped to the host. I didn't see any discrepancy there too.

However, I did see an issue with the BDM table in Nova where "controller-info" column does not rollback the information about "target-id" properly.
Therefore, I am moving this bug to Nova.