Drivers: hv: Execute shutdown in a thread context

Hello,

Please consider including upstream commit:
3dd6cb497198a0533a2530b6a345c60c9a29b9bc in the next v3.8.y release. It was included upstream as of v3.9-rc1. It has been tested and confirmed to resolve http://bugs.launchpad.net/bugs/1180419 .

commit 3dd6cb497198a0533a2530b6a345c60c9a29b9bc

Author: K. Y. Srinivasan <[email protected]>
Date:   Wed Jan 23 17:42:45 2013 -0800

Drivers: hv: Execute shutdown in a thread context

Sincerely,
Joseph Salisbury