fcoet_clear_unsol_exchange
if (fcoet_clear_unsol_exchange(xch) == FCOE_SUCCESS) {
if (fcoet_clear_unsol_exchange(xch) == FCOE_FAILURE) {
int fcoet_clear_unsol_exchange(fcoet_exchange_t *xch);
(void) fcoet_clear_unsol_exchange(CMD2XCH(cmd));