Some change between 5.11-rc6 and 5.11-rc7 is causing frequently storms of usb
resets, significantly eating cpu power: 

[Sa M���r 27 20:17:47 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:17:52 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:17:58 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:18:03 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:18:09 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:18:15 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd
[Sa M���r 27 20:18:20 2021] usb 3-1.1.3: reset high-speed USB device number 6
using xhci_hcd

it stops usually after turning off/on the monitor (the usb hub this is
connected to is builtin to my display), but sometimes it just stops by itself,
and then at some later point in time resumes again. No idea what exactly
triggers it, but I've never seen this with 5.11-rc6 or below. 

lsusb -t -v for this sub tree is:


/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 1: Dev 18, If 0, Class=Hub, Driver=hub/6p, 480M
        ID 0451:8442 Texas Instruments, Inc. 
        |__ Port 6: Dev 25, If 0, Class=, Driver=, 480M
            ID 0451:82ee Texas Instruments, Inc. 
        |__ Port 2: Dev 21, If 3, Class=Human Interface Device, Driver=usbhid,
12M
            ID 047f:c025 Plantronics, Inc. 
        |__ Port 2: Dev 21, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            ID 047f:c025 Plantronics, Inc. 
        |__ Port 2: Dev 21, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            ID 047f:c025 Plantronics, Inc. 
        |__ Port 2: Dev 21, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            ID 047f:c025 Plantronics, Inc. 
        |__ Port 5: Dev 24, If 0, Class=Human Interface Device, Driver=usbhid,
480M
            ID 0451:82ff Texas Instruments, Inc. 
        |__ Port 1: Dev 19, If 0, Class=Hub, Driver=hub/4p, 480M
            ID 0bda:5411 Realtek Semiconductor Corp. RTS5411 Hub
            |__ Port 3: Dev 23, If 2, Class=Audio, Driver=snd-usb-audio, 480M
                ID 046d:0825 Logitech, Inc. Webcam C270
            |__ Port 3: Dev 23, If 0, Class=Video, Driver=uvcvideo, 480M
                ID 046d:0825 Logitech, Inc. Webcam C270
            |__ Port 3: Dev 23, If 3, Class=Audio, Driver=snd-usb-audio, 480M
                ID 046d:0825 Logitech, Inc. Webcam C270
            |__ Port 3: Dev 23, If 1, Class=Video, Driver=uvcvideo, 480M
                ID 046d:0825 Logitech, Inc. Webcam C270