libusb 异步批量传输数据丢失

当我使用“libusb_fill_bulk_transfer”异步传输数据时，存在读取数据丢失的情况，每次只有“libusb_fill_bulk_transfer”中设置的缓存存满时，它才进入回调函数。这是正常吗
伪代码：
bool QUniversalSerialBus :: UsbOpen（）
{
// libusb1.0.22
int rc;
rc = libusb_open（usbDevice，＆dHand）;
if（rc！= 0）
{
qDebug（）<<“libusbOpen文件：”<< rc;
返回false;
}
rc = libusb_claim_interface（dHand，0）;
if（rc！= 0）
{
qDebug（）<<“libusb_claim_interface file：”<< rc;
返回false;
}
异步读取（）;
//
返回true;

void QUniversalSerialBus :: AsyncRead（）
{
int rc = 0;
m_read_transfer_mutex.lock（）;
qTransfer = libusb_alloc_transfer（0）;
readBuffer.resize（1024）;

libusb_fill_bulk_transfer(qTransfer,dHand,130,reinterpret_cast(readBuffer.data()),1024,&callbackRevc,this,0);

rc = libusb_submit_transfer(qTransfer);
if(rc < 0)
{
libusb_free_transfer(qTransfer);
qTransfer = nullptr;
qDebug() << "libusb_submit_transfer file:" << rc;
return;
}
}

void QUniversalSerialBus :: callbackRevc（struct libusb_transfer * transfer）
{
if（transfer-> status！= LIBUSB_TRANSFER_COMPLETED）{

    return ;

}

QUniversalSerialBus* qObj = static_cast(transfer->user_data);

{
QByteArray s((char*)transfer->buffer,transfer->actual_length);
QString str = s.toHex().data();
qDebug() << str;

qObj->Reviceiver(transfer->buffer,transfer->actual_length);

}

libusb_free_transfer(transfer);
transfer = nullptr;
qObj->qTransfer = nullptr;
qObj->readBuffer.clear();
qObj->m_read_transfer_mutex.unlock();
qObj->AsyncRead();
return;
}

请问问题解决了吗？