Issue happens as below scenaio:
1 suspend happens, but dp_rx_thread didn't finish in time,
so timeout happens for suspend_event, here suspend will
return success to kernel.
2 resume happens before dp_rx_thread to reset resume_event,
and resume finished.
3 if dp_rx_thread finished and blocking with resume_event,
and in following test, suspend didn't come(longer then
hang detect time).
4 hang detect will alarm.
Fix is to return failure if dp_rx_thread can't be suspend
in time. Suspend can triger again later.
Change-Id: Ifbfdef5bb1c8d6e00b8fa5cc5e6dc74d3495c9ea
CRs-Fixed: 2626468
9a4d95c3fd