CC2650EM-5XD-RD: Not able to power down the radio core

static void rxTaskFunction(UArg arg0, UArg arg1)
{
    RF_Params rfParams;
    rfParams.nInactivityTimeout = 1000;
    RF_Params_init(&rfParams);

    if( RFQueue_defineQueue(&dataQueue,
                            rxDataEntryBuffer,
                            sizeof(rxDataEntryBuffer),
                            NUM_DATA_ENTRIES,
                            MAX_LENGTH + NUM_APPENDED_BYTES))
    {
        /* Failed to allocate space for all data entries */
        while(1);
    }


    while(1)
    {
      rfHandle = RF_open(&rfObject, &RF_prop, (RF_RadioSetup*)&RF_cmdPropRadioDivSetup, &rfParams);

      /* Set the frequency */
      RF_CmdHandle ch1 = RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);
 
      /* Modify CMD_PROP_RX command for application needs */
      RF_cmdPropRx.pQueue = &dataQueue;           /* Set the Data Entity queue for received data */
      RF_cmdPropRx.rxConf.bAutoFlushIgnored = 1;  /* Discard ignored packets from Rx queue */
      RF_cmdPropRx.rxConf.bAutoFlushCrcErr = 1;   /* Discard packets with CRC error from Rx queue */
      RF_cmdPropRx.maxPktLen = MAX_LENGTH;        /* Implement packet length filtering to avoid PROP_ERROR_RXBUF */
      RF_cmdPropRx.pktConf.bRepeatOk = 1;
      RF_cmdPropRx.pktConf.bRepeatNok = 1;
        
      /* Enter RX mode and stay forever in RX */
      RF_CmdHandle ch2 = RF_postCmd(rfHandle, (RF_Op*)&RF_cmdPropRx, RF_PriorityNormal, &callback, IRQ_RX_ENTRY_DONE);
   
      Task_sleep(2000000/ Clock_tickPeriod);
    
      RF_cancelCmd(rfHandle,ch2,0);
      RF_cancelCmd(rfHandle,ch1,0);
      RF_close(rfHandle);
     
      Task_sleep(10000000/ Clock_tickPeriod);
    }
}

void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e)
{
    if (e & RF_EventRxEntryDone)
    {
       printf("rx\n");
       /*Get current unhandled data entry */
       currentDataEntry = RFQueue_getDataEntry();

       /* Handle the packet data, located at &currentDataEntry->data:
        * - Length is the first byte with the current configuration
        * - Data starts from the second byte */
        packetLength      = *(uint8_t*)(&currentDataEntry->data);
        packetDataPointer = (uint8_t*)(&currentDataEntry->data + 1);

        /* Copy the payload + the status byte to the packet variable */
        memcpy(packet, packetDataPointer, (packetLength + 1));
        
        RFQueue_nextEntry();
    }
}

int main(void)
{
    Power_init();
    Power_enablePolicy();
    
    /* Locals */
    Task_Params taskParams;

    /* Do PIN init before starting the kernel */
    PIN_init(BoardGpioInitTable);

    Power_setDependency(PowerCC26XX_PERIPH_SSI0); 

    Task_Params_init(&rxTaskParams);
    rxTaskParams.stackSize = RX_TASK_STACK_SIZE;
    rxTaskParams.stack = &rxTaskStack;
    Task_construct(&rxTask, rxTaskFunction, &rxTaskParams, NULL);
    
    /* Start kernel. */
    BIOS_start();

    /* Should never get here; include a return to keep the compiler happy */
    return 0;
}