Problem about setting IOTTYBaseName in USBSerialDriverKit

Question

I want know how to set IOTTYBaseName in USBSerialDriverKit.I try to use SetProperties method inherit from IOService like following code, but the methodreturn -301 error code.

    super::CopyProperties(&pDict);
    bResult = OSDictionarySetValue(pDict, kIOTTYBaseNameKey, tty_name);
    if(bResult) {
        PL_OSLOG("SET TRUE");
    } else {
        PL_OSLOG("SET FALSE");
    }
    result = super::SetProperties(pDict);

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