On Tue, Nov 23, 2021 at 08:16:13AM +0100, Anton Lundin wrote:

I just picked up a new usb-rs232 adapter and was met by the following on
a modern kernel:

# uname -r
5.16.0-rc2

usb 3-7: new full-speed USB device number 5 using xhci_hcd
usb 3-7: New USB device found, idVendor=067b, idProduct=23a3, bcdDevice= 1.05
usb 3-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 3-7: Product: ATEN USB to Serial Bridge
usb 3-7: Manufacturer: Prolific Technology Inc.
pl2303 3-7:1.0: pl2303 converter detected
pl2303 3-7:1.0: unknown device type, please report to linux-usb@vger.kernel.org

I'm guessing it just needs a case for this bcdDevice.

Indeed, and thanks for reporting this. I'll add the missing entry.

Do you know what kind of PL2303 this is (e.g. PL2303GC)?

Johan