<div dir="ltr"><div>Acked-by: Luke Nowakowski-Krijger <<a href="mailto:luke.nowakowskikrijger@canonical.com">luke.nowakowskikrijger@canonical.com</a>> </div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jun 12, 2022 at 11:12 PM Po-Hsu Lin <<a href="mailto:po-hsu.lin@canonical.com">po-hsu.lin@canonical.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">[Impact] After switching to a more strict chip type detection for the pl2303 USB to serial adaptor driver in commit 8a7bf751 ("USB: serial: pl2303: amend and tighten type detection") Device with bcdUSB other than 1.10 and 2.00 will stop working. For example the Cashino PTP-lil/BT24 Slip printer with bcdUSB 1.01. [Fix] * e82e7c6dde ("USB: serial: pl2303: fix type detection for odd device") This patch can be cherry-picked to all of the affected kernels. [Test] Test kernels can be found here: <a href="https://people.canonical.com/~phlin/kernel/lp-1967493-pl2303/" rel="noreferrer" target="_blank">https://people.canonical.com/~phlin/kernel/lp-1967493-pl2303/</a> F-5.13 has been tested by the bug reporter and the result is good. [Where problems could occur] Change limited to this specific driver (and even to this specific type of devices), if anything goes wrong the adaptor might be not working. Johan Hovold (1): USB: serial: pl2303: fix type detection for odd device drivers/usb/serial/pl2303.c | 3 +++ 1 file changed, 3 insertions(+) -- 2.7.4 -- kernel-team mailing list <a href="mailto:kernel-team@lists.ubuntu.com" target="_blank">kernel-team@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/kernel-team" rel="noreferrer" target="_blank">https://lists.ubuntu.com/mailman/listinfo/kernel-team</a> </blockquote></div></div>