cc2640r2f 调用GATT_bm_alloc()函数分配内存，在数据传输中出现很多次申请失败

如题：

以下是调用的函数，出现的次很多，倒至数据通信超时。

uint8_t label_writedata(uint8_t *data, uint8_t len)
{
  // Do a write
  attWriteReq_t req;
  uint8_t status;
  // Allocate GATT write request
  req.pValue = GATT_bm_alloc(connHandle, ATT_WRITE_REQ, len, NULL);//分配内存
  // If successfully allocated
  if (req.pValue != NULL)
  {
    // Fill up request
    req.handle = 0x17;
    req.len = len;
    memcpy(req.pValue, data, len);
    req.sig = 0;
    req.cmd = 1;

    // Send GATT write to controller
    status = GATT_WriteNoRsp(connHandle, &req);//写ble从机
    //status = GATT_WriteLongCharValue(connHandle, &req, selfEntity);
   
   
    // If not sucessfully sent
    if ( status != SUCCESS )
    {
      // Free write request as the controller will not
      GATT_bm_free((gattMsg_t *)&req, ATT_WRITE_REQ);
    }
    else
    {
      Util_restartClock(&startConClock,MR_CONNECT_EVT_PERIOD);//add lhj 191115
    }
  }
  else
  {
    //GATT_bm_free((gattMsg_t *)&req, ATT_WRITE_REQ);//del lhj 191202
    status = FAILURE;
   
  }
 
  return status;
}