On Tue, Aug 03, 2021 at 11:41:33PM -0700, Vasily Khoruzhick wrote: > On Fri, Jul 30, 2021 at 5:42 AM Johan Hovold <johan@xxxxxxxxxx> wrote: > > On Thu, Jul 29, 2021 at 10:37:00AM -0700, Vasily Khoruzhick wrote: > > > On Thu, Jul 29, 2021 at 3:02 AM Johan Hovold <johan@xxxxxxxxxx> wrote: > > > Bus 001 Device 024: ID 067b:23c3 Prolific Technology, Inc. USB-Serial > > > Controller > > > Device Descriptor: > > > bLength 18 > > > bDescriptorType 1 > > > bcdUSB 2.00 > > > bDeviceClass 0 > > > bDeviceSubClass 0 > > > bDeviceProtocol 0 > > > bMaxPacketSize0 64 > > > idVendor 0x067b Prolific Technology, Inc. > > > idProduct 0x23c3 > > > bcdDevice 3.05 > > > > Thanks. Based on the above it looks like either a TA using the default > > GT idProduct and new subminor release number (3.05), or it's a GT with > > an undocumented release number (the datasheet says it should be 1.00). > > Could you try applying the patch below and check the log for that > > pl2303_supports_hx_status() printk? If it is indeed a GT then this > > should also make the device work again. > > Thanks, with this patch it works: > > [793566.912312] usb 1-1: new full-speed USB device number 43 using xhci_hcd > [793567.053688] usb 1-1: New USB device found, idVendor=067b, > idProduct=23c3, bcdDevice= 3.05 > [793567.053702] usb 1-1: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [793567.053708] usb 1-1: Product: USB-Serial Controller > [793567.053712] usb 1-1: Manufacturer: Prolific Technology Inc. > [793567.053716] usb 1-1: SerialNumber: CMA>b103Y23 > [793567.056684] pl2303 1-1:1.0: pl2303 converter detected > [793567.056956] pl2303 1-1:1.0: pl2303_supports_hx_status - ret = -32 > [793567.057281] usb 1-1: pl2303 converter now attached to ttyUSB0 > > I tested it with picocom at 115200 baud. > > You can have my: > > Tested-by: Vasily Khoruzhick <anarsoul@xxxxxxxxx> Thanks for testing. I'll reply with a patch to get this fixed in 5.14-rc and backported to 5.13. Johan
