Comment # 12
on bug 1190411
from Roger Whittaker
I did a kexec reboot and then:
echo "module xhci_pci +mfp" > /sys/kernel/debug/dynamic_debug/control
echo "module xhci_hcd +mfp" > /sys/kernel/debug/dynamic_debug/control
rmmod xhci_pci
rmmod xhci_hcd
rmmod xhci_pci_renesas
modprobe xhci_pci
modprobe xhci_hcd
modprobe xhci_pci_renesas
echo "module xhci_pci +mfp" > /sys/kernel/debug/dynamic_debug/control
echo "module xhci_hcd +mfp" > /sys/kernel/debug/dynamic_debug/control
The relevant dmesg extract is:
[ 30.181244] xhci_hcd 0000:00:14.0: remove, state 1
[ 30.181252] usb usb2: USB disconnect, device number 1
[ 30.181407] xhci_hcd:xhci_check_args: xHCI xhci_drop_endpoint called for
root hub
[ 30.181410] xhci_hcd:xhci_check_args: xHCI xhci_check_bandwidth called for
root hub
[ 30.181496] xhci_hcd 0000:00:14.0: USB bus 2 deregistered
[ 30.198306] xhci_hcd 0000:00:14.0: xHCI host controller not responding,
assume dead
[ 30.198314] xhci_hcd 0000:00:14.0: remove, state 1
[ 30.198322] usb usb1: USB disconnect, device number 1
[ 30.198623] xhci_hcd:xhci_check_args: xHCI xhci_drop_endpoint called for
root hub
[ 30.198629] xhci_hcd:xhci_check_args: xHCI xhci_check_bandwidth called for
root hub
[ 30.198863] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: // Halt the HC
[ 30.198871] xhci_hcd 0000:00:14.0: Host halt failed, -19
[ 30.198876] xhci_hcd 0000:00:14.0: Host not accessible, reset failed.
[ 30.198942] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: // Disabling
event ring interrupts
[ 30.198950] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: cleaning up
memory
[ 30.198958] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed event ring
[ 30.198964] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed command
ring
[ 30.198972] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed segment
pool
[ 30.198977] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed device
context pool
[ 30.198981] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed small
stream array pool
[ 30.198985] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: Freed medium
stream array pool
[ 30.199091] xhci_hcd:xhci_dbg_trace: xhci_hcd 0000:00:14.0: xhci_stop
completed - status = ffffffff
[ 30.199094] xhci_hcd 0000:00:14.0: USB bus 1 deregistered
[ 36.106382] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 36.106397] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
number 1
[ 36.107444] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100
quirks 0x000000000004b810
[ 36.107594] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002,
bcdDevice= 5.14
[ 36.107597] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 36.107598] usb usb1: Product: xHCI Host Controller
[ 36.107599] usb usb1: Manufacturer: Linux 5.14.6-1-default xhci-hcd
[ 36.107601] usb usb1: SerialNumber: 0000:00:14.0
[ 36.108112] hub 1-0:1.0: USB hub found
[ 36.108134] hub 1-0:1.0: 9 ports detected
[ 36.111654] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 36.111663] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
number 2
[ 36.111669] xhci_hcd 0000:00:14.0: Host supports USB 3.0 SuperSpeed
[ 36.111725] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003,
bcdDevice= 5.14
[ 36.111729] usb usb2: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 36.111732] usb usb2: Product: xHCI Host Controller
[ 36.111734] usb usb2: Manufacturer: Linux 5.14.6-1-default xhci-hcd
[ 36.111736] usb usb2: SerialNumber: 0000:00:14.0
[ 36.111996] hub 2-0:1.0: USB hub found
[ 36.112009] hub 2-0:1.0: 4 ports detected