Comment # 10 on bug 1190411 from Roger Whittaker

Corrected test:

rmmod xhci_pci
rmmod xhci_hcd
rmmod xhci_pci_renesas

then

modprobe xhci_pci
modprobe xhci_hcd
modprobe xhci_pci_renesas

then unplug and replug mouse, keyboard and two USB disks.

dmesg after doing these:

[   85.218000] xhci_hcd 0000:00:14.0: remove, state 1
[   85.218010] usb usb2: USB disconnect, device number 1
[   85.218482] xhci_hcd 0000:00:14.0: USB bus 2 deregistered
[   85.238848] xhci_hcd 0000:00:14.0: xHCI host controller not responding,
assume dead
[   85.238856] xhci_hcd 0000:00:14.0: remove, state 1
[   85.238864] usb usb1: USB disconnect, device number 1
[   85.239378] xhci_hcd 0000:00:14.0: Host halt failed, -19
[   85.239387] xhci_hcd 0000:00:14.0: Host not accessible, reset failed.
[   85.239586] xhci_hcd 0000:00:14.0: USB bus 1 deregistered
[   97.099036] xhci_hcd 0000:00:14.0: xHCI Host Controller
[   97.099052] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
number 1
[   97.100102] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100
quirks 0x000000000004b810
[   97.100252] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002,
bcdDevice= 5.14
[   97.100254] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[   97.100256] usb usb1: Product: xHCI Host Controller
[   97.100257] usb usb1: Manufacturer: Linux 5.14.6-1-default xhci-hcd
[   97.100258] usb usb1: SerialNumber: 0000:00:14.0
[   97.100505] hub 1-0:1.0: USB hub found
[   97.100524] hub 1-0:1.0: 9 ports detected
[   97.102777] xhci_hcd 0000:00:14.0: xHCI Host Controller
[   97.102784] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
number 2
[   97.102790] xhci_hcd 0000:00:14.0: Host supports USB 3.0 SuperSpeed
[   97.102842] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003,
bcdDevice= 5.14
[   97.102847] usb usb2: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[   97.102850] usb usb2: Product: xHCI Host Controller
[   97.102852] usb usb2: Manufacturer: Linux 5.14.6-1-default xhci-hcd
[   97.102854] usb usb2: SerialNumber: 0000:00:14.0
[   97.103272] hub 2-0:1.0: USB hub found
[   97.103289] hub 2-0:1.0: 4 ports detected