Do not grant delegation if lock_op has failed.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Unlock before return.

Signed-off-by: Jeremy Bongio <jbongio@us.ibm.com>
Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Set fsal in upcall args.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>