
1. If CSA failed for last CSA in progress, can't stop SAP, SAP stop and SAP CSA concurrency may lead to assert. 2. When access global var like pm_conc_connection_list, always need add lock protection. 3. During CSA in progress, NAN CSA don't block current thread, just return. 4. When SAP CSA completed, need check whether need CSA again for NAN started during CSA. Change-Id: I076ecad7395a265bbe83aaf97617a9a8b6c8b41a CRs-Fixed: 3357265