BugLink: http://bugs.launchpad.net/bugs/1544679

Make instance->adprecovery variable atomic and removes hba_lock spinlock
while accessing instance->adprecovery.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from linux-next commit 19a9f01b55a094d46f02c50d7906514f239ab737)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>