Re: pl2303 : unknown device type

[Johan Hovold <johan@kernel.org>]

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On Tue, Jul 27, 2021 at 02:37:23PM +0200, Chris wrote:
> This problem was introduced with 5.13 and still persists in 5.13.5
> After downgrading to 5.12.x, everything works like expected. Tested on 
> archlinux. The device is an "ICP-DAS I-7561"

Thanks for reporting this.

> lsusb -v
> 
> Bus 002 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port / Mobile Action MA-8910P
> Couldn't open device, some information will be missing
> 
> Device Descriptor:
>   bLength                18
>   bDescriptorType         1
>   bcdUSB               1.10
>   bDeviceClass            0
>   bDeviceSubClass         0
>   bDeviceProtocol         0
>   bMaxPacketSize0        64
>   idVendor           0x067b Prolific Technology, Inc.
>   idProduct          0x2303 PL2303 Serial Port / Mobile Action MA-8910P
>   bcdDevice           5d.ca

This is an unexpected device version (93.202) which may need to add a
special case for. The descriptors look just fine otherwise and matches
for example an HXD device I have here (with bcdDevice 4.00) but I guess
it could also be an HX or earlier.

Do you have any idea what kind of chip this is? 

Johan

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