> I'm not sure I understand your question; what did you mean here? > > This patch will be included in Linux 5.5, if that's what your asking. > At 1/18/2018, "USB: serial: pl2303: add new PID to support PL2303TB" is approved At 1/27/2018, Greg KH help to update the patch on 4.20, 4.19, 4.14, 4.9, 4.4, 3.18 stable tree. Email title on 1/27/2018. Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 4.20-stable tree Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 4.19-stable tree Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 4.14-stable tree Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 4.9-stable tree Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 4.4-stable tree Patch "USB: serial: pl2303: add new PID to support PL2303TB" has been added to the 3.18-stable tree patch "USB: serial: pl2303: add new PID to support PL2303TB" added to usb-linus Therefor, this time can update the patch between 5.5 and 4.4 (or 3.18)? Charles.