Today I have upgraded a PC from TW 20201218 to TW 20210115.
Unfortunately, the Logitech QuickCam Zoom plugged to it is no longer working.
All I get is a black screen. Tested on Zoom and Firefox.

pwc: Failed to allocate urb buffer 0

It worked fine before. I assume it has something to do with the new kernel.

kernel-default-5.9.14-1.2.x86_64: OK
kernel-default-5.10.7-1.2.x86_64: NON-OK

Workaround: boot up with the previous kernel.

lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 13d3:3414 IMC Networks Bluetooth Radio 
Bus 001 Device 003: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Bus 001 Device 007: ID 046d:08b3 Logitech, Inc. QuickCam Zoom
Bus 001 Device 006: ID 1a81:1004 Holtek Semiconductor, Inc. Wireless Dongle 2.4
GHZ HT82D40REW
Bus 001 Device 004: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

hwinfo --cam
01: USB 00.2: 10f00 Camera                                      
  [Created at usb.122]
  Unique ID: cOn9.AN_e7XL7ryA
  Parent ID: cLrx.d7FDLX76qXB
  SysFS ID: /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3/1-2.3:1.2
  SysFS BusID: 1-2.3:1.2
  Hardware Class: camera
  Model: "Logitech QuickCam Zoom"
  Hotplug: USB
  Vendor: usb 0x046d "Logitech, Inc."
  Device: usb 0x08b3 "QuickCam Zoom"
  Driver: "snd-usb-audio"
  Driver Modules: "snd_usb_audio"
  Speed: 12 Mbps
  Module Alias: "usb:v046Dp08B3d0000dc00dsc00dp00ic01isc02ip00in02"
  Driver Info #0:
    Driver Status: pwc is active
    Driver Activation Cmd: "modprobe pwc"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #3 (Hub)