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