add option to set input and output buffer size

[ghost]

I am working on a serious USB project where every byte is crucial. The problem I am facing is most of the device receiving all bytes perfectly but few xiaomi device/tablet missing some bytes.

Samsung: received packet - 100% OnePlus: received packet - 100% Xiaomi: received packet - 95%

So, My guess this could be buffer problem on device on something inside the OS optimization.