kworker takes 100% core after unplugging usb c hub

kworker takes 100% core after unplugging usb c hub

[Yiyu Zhu]

Hi,

I have an Anker A8383 USB C hub with power delivery. I use the hub for
both charging and connecting to network. But when I unplug the hub, it
sometimes causes two kworker processes to occupy 100 % cpu time.
The issue will go away if I plug something back into the usbc port.
And the issue seems to persist through reboot.

I am running kernel version 5.8.0-43-generic #49~20.04.1-Ubuntu SMP

Here are the two problematic kworker from pidstat

05:06:50 PM     0     13702    0.00   92.00    0.00    8.00   92.00
 6  kworker/6:3+pm
05:06:50 PM     0     14510    0.00   92.00    0.00    8.00   92.00
 5  kworker/5:3+usb_hub_wq

I also tried to trace what those kworker are working on by

echo 1 > events/workqueue/workqueue_queue_work/enable

And the trace file was occupied with

     kworker/6:3-13702   [006] d... 55465.131483:
workqueue_queue_work: work struct=000000002c91f94a
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=6
     kworker/5:3-14510   [005] d... 55465.131484:
workqueue_queue_work: work struct=000000001307b478 function=hub_event
workqueue=0000000050d44cf1 req_cpu=8192 cpu=5
     kworker/5:3-14510   [005] d... 55465.131491:
workqueue_queue_work: work struct=000000000a62d754
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=5
     kworker/6:3-13702   [006] d... 55465.131516:
workqueue_queue_work: work struct=0000000043fda29b function=hub_event
workqueue=0000000050d44cf1 req_cpu=8192 cpu=6
     kworker/6:3-13702   [006] d... 55465.131547:
workqueue_queue_work: work struct=000000002c91f94a
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=6
     kworker/5:3-14510   [005] d... 55465.131563:
workqueue_queue_work: work struct=000000001307b478 function=hub_event
workqueue=0000000050d44cf1 req_cpu=8192 cpu=5
     kworker/6:3-13702   [006] d... 55465.131565:
workqueue_queue_work: work struct=0000000043fda29b function=hub_event
workqueue=0000000050d44cf1 req_cpu=8192 cpu=6
     kworker/5:3-14510   [005] d... 55465.131569:
workqueue_queue_work: work struct=000000000a62d754
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=5
     kworker/6:3-13702   [006] d... 55465.131570:
workqueue_queue_work: work struct=000000002c91f94a
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=6
     kworker/6:3-13702   [006] d... 55465.131610:
workqueue_queue_work: work struct=0000000043fda29b function=hub_event
workqueue=0000000050d44cf1 req_cpu=8192 cpu=6
     kworker/6:3-13702   [006] d... 55465.131633:
workqueue_queue_work: work struct=000000002c91f94a
function=pm_runtime_work workqueue=000000004caabfbb req_cpu=8192 cpu=6


Here is the output from lsusb

Bus 004 Device 005: ID 058f:8468 Alcor Micro Corp.
Bus 004 Device 004: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153
Gigabit Ethernet Adapter
Bus 004 Device 003: ID 05e3:0626 Genesys Logic, Inc.
Bus 004 Device 002: ID 2900:8383 Generic 4-Port USB 3.0 Hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 8087:0a2b Intel Corp.
Bus 001 Device 002: ID 0408:5251 Quanta Computer, Inc. HP Wide Vision FHD Camera
Bus 001 Device 072: ID 0bda:5450 Realtek Semiconductor Corp. HP Wide
Vision FHD Camera
Bus 001 Device 071: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 070: ID 291a:5423 Generic 4-Port USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Here is the part of dmesg that I think is relevant: (I was trying to
plug in and unplug the hub to recreate the issue.)

[55836.538747] pci_bus 0000:03: Allocating resources
[55836.538778] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[55836.538794] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55836.538796] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[55836.538800] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55836.538802] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[55836.902256] usb 1-3: new high-speed USB device number 60 using xhci_hcd
[55837.058338] usb 1-3: New USB device found, idVendor=291a,
idProduct=5423, bcdDevice= 1.0a
[55837.058346] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[55837.058351] usb 1-3: Product: 4-Port USB 2.0 Hub
[55837.058355] usb 1-3: Manufacturer: Generic
[55837.059847] hub 1-3:1.0: USB hub found
[55837.060046] hub 1-3:1.0: 5 ports detected
[55837.354225] usb 1-3.1: new high-speed USB device number 61 using xhci_hcd
[55837.461292] usb 1-3.1: New USB device found, idVendor=05e3,
idProduct=0610, bcdDevice= 6.55
[55837.461300] usb 1-3.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[55837.461306] usb 1-3.1: Product: USB2.1 Hub
[55837.461310] usb 1-3.1: Manufacturer: GenesysLogic
[55837.463003] hub 1-3.1:1.0: USB hub found
[55837.463363] hub 1-3.1:1.0: 4 ports detected
[55837.934650] hp_wmi: Unknown event_id - 131073 - 0x0
[55837.950209] usb 1-3.5: new high-speed USB device number 62 using xhci_hcd
[55838.057266] usb 1-3.5: New USB device found, idVendor=0bda,
idProduct=5450, bcdDevice= 1.01
[55838.057271] usb 1-3.5: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[55838.057275] usb 1-3.5: Product: BillBoard Device
[55838.057278] usb 1-3.5: Manufacturer: Realtek
[55838.446698] hp_wmi: Unknown event_id - 131073 - 0x0
[55841.442698] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
[55841.442738] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
[55841.442810] pci 0000:38:00.0: enabling Extended Tags
[55841.442949] pci 0000:38:00.0: supports D1 D2
[55841.442950] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[55841.443055] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31.504
Gb/s with 8.0 GT/s PCIe x4 link)
[55841.443190] pcieport 0000:03:02.0: ASPM: current common clock
configuration is inconsistent, reconfiguring
[55841.443303] pci_bus 0000:03: Allocating resources
[55841.443325] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[55841.443329] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55841.443329] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[55841.443331] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55841.443331] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[55841.443625] xhci_hcd 0000:38:00.0: xHCI Host Controller
[55841.443628] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 3
[55841.444780] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
version 0x110 quirks 0x0000000200009810
[55841.445088] usb usb3: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.08
[55841.445090] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[55841.445090] usb usb3: Product: xHCI Host Controller
[55841.445091] usb usb3: Manufacturer: Linux 5.8.0-43-generic xhci-hcd
[55841.445092] usb usb3: SerialNumber: 0000:38:00.0
[55841.445315] hub 3-0:1.0: USB hub found
[55841.445323] hub 3-0:1.0: 2 ports detected
[55841.445871] xhci_hcd 0000:38:00.0: xHCI Host Controller
[55841.445873] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 4
[55841.445875] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[55841.445905] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 5.08
[55841.445905] usb usb4: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[55841.445906] usb usb4: Product: xHCI Host Controller
[55841.445907] usb usb4: Manufacturer: Linux 5.8.0-43-generic xhci-hcd
[55841.445907] usb usb4: SerialNumber: 0000:38:00.0
[55841.446059] hub 4-0:1.0: USB hub found
[55841.446066] hub 4-0:1.0: 2 ports detected
[55841.890489] usb 4-2: new SuperSpeedPlus Gen 2 USB device number 2
using xhci_hcd
[55841.914304] usb 4-2: New USB device found, idVendor=2900,
idProduct=8383, bcdDevice= 1.0a
[55841.914310] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[55841.914314] usb 4-2: Product: 4-Port USB 3.0 Hub
[55841.914318] usb 4-2: Manufacturer: Generic
[55841.917881] hub 4-2:1.0: USB hub found
[55841.918251] hub 4-2:1.0: 4 ports detected
[55842.210614] usb 4-2.1: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
[55842.234139] usb 4-2.1: New USB device found, idVendor=05e3,
idProduct=0626, bcdDevice= 6.55
[55842.234145] usb 4-2.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[55842.234148] usb 4-2.1: Product: USB3.1 Hub
[55842.234151] usb 4-2.1: Manufacturer: GenesysLogic
[55842.237477] hub 4-2.1:1.0: USB hub found
[55842.237836] hub 4-2.1:1.0: 4 ports detected
[55842.526714] usb 4-2.1.3: new SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[55842.550133] usb 4-2.1.3: New USB device found, idVendor=0bda,
idProduct=8153, bcdDevice=30.00
[55842.550139] usb 4-2.1.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=6
[55842.550143] usb 4-2.1.3: Product: USB 10/100/1000 LAN
[55842.550146] usb 4-2.1.3: Manufacturer: Realtek
[55842.550149] usb 4-2.1.3: SerialNumber: 000001
[55842.630589] usb 4-2.1.4: new SuperSpeed Gen 1 USB device number 5
using xhci_hcd
[55842.652867] usb 4-2.1.4: New USB device found, idVendor=058f,
idProduct=8468, bcdDevice= 1.00
[55842.652873] usb 4-2.1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[55842.652877] usb 4-2.1.4: Product: Mass Storage Device
[55842.652880] usb 4-2.1.4: Manufacturer: Generic
[55842.652882] usb 4-2.1.4: SerialNumber: 058F84688461
[55842.659277] usb-storage 4-2.1.4:1.0: USB Mass Storage device detected
[55842.659630] scsi host4: usb-storage 4-2.1.4:1.0
[55842.731243] usb 4-2.1.3: reset SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[55842.774922] r8152 4-2.1.3:1.0: load rtl8153a-4 v2 02/07/20 successfully
[55842.802955] r8152 4-2.1.3:1.0 eth0: v1.11.11
[55842.831883] r8152 4-2.1.3:1.0 enx00e04cb5877c: renamed from eth0
[55843.667490] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
  1.00 PQ: 0 ANSI: 6
[55843.668004] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
  1.08 PQ: 0 ANSI: 6
[55843.668638] sd 4:0:0:0: Attached scsi generic sg0 type 0
[55843.669188] sd 4:0:0:1: Attached scsi generic sg1 type 0
[55843.699682] sd 4:0:0:1: [sdb] Attached SCSI removable disk
[55843.700886] sd 4:0:0:0: [sda] Attached SCSI removable disk
[55845.974915] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04cb5877c: link
becomes ready
[55845.975197] r8152 4-2.1.3:1.0 enx00e04cb5877c: carrier on
[55846.582853] pci_bus 0000:03: Allocating resources
[55846.582892] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[55846.582909] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55846.582912] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[55846.582919] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[55846.582922] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[56382.630334] usb 1-3: USB disconnect, device number 60
[56382.630341] usb 1-3.1: USB disconnect, device number 61
[56382.633343] usb 1-3.5: USB disconnect, device number 62
[56382.702207] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
intr, status -71
[56382.729232] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
[56382.859307] usb usb3-port2: over-current condition
[56382.926145] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
[56383.154145] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
[56383.387194] usb 4-2: USB disconnect, device number 2
[56383.387200] usb 4-2.1: USB disconnect, device number 3
[56383.387203] usb 4-2.1.3: USB disconnect, device number 4
[56383.464366] usb 4-2.1.4: USB disconnect, device number 5
[56384.015157] usb usb4-port2: over-current condition

Please let me know if you need any further information.

Thanks
Yiyu Zhu

Re: kworker takes 100% core after unplugging usb c hub

[Greg KH]

On Wed, Feb 10, 2021 at 06:31:56PM -0800, Yiyu Zhu wrote:
> Hi,
> 
> I have an Anker A8383 USB C hub with power delivery. I use the hub for
> both charging and connecting to network. But when I unplug the hub, it
> sometimes causes two kworker processes to occupy 100 % cpu time.
> The issue will go away if I plug something back into the usbc port.
> And the issue seems to persist through reboot.
> 
> I am running kernel version 5.8.0-43-generic #49~20.04.1-Ubuntu SMP

That is a very old kernel, and a distro-specific one.  Please try the
latest 5.10.y release, or report the problem to Ubuntu as they are the
only ones that can support that unknown kernel.

good luck!

greg k-h

Re: kworker takes 100% core after unplugging usb c hub

[Yiyu Zhu]

Hi Greg,

I just updated the kernel to 5.10.15-051015-generic. (It is the
ubuntu's mainline build. I am not sure if that matters.)

The issue is still there but with a slightly different behavior. There
is still high cpu usage but the two kworkers seem to take turns.

01:18:49 AM     0       117    0.00   87.00    0.00   13.00   87.00
 2  kworker/2:1+usb_hub_wq
01:18:50 AM     0       117    0.00   87.00    0.00   12.00   87.00
 2  kworker/2:1+pm

The trace is now filled with:

     kworker/2:1-117     [002] d...   450.048063:
workqueue_queue_work: work struct=00000000573429cf function=hub_event
workqueue=000000007b72f8bb req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048097:
workqueue_queue_work: work struct=000000005facda71 function=hub_event
workqueue=000000007b72f8bb req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048104:
workqueue_queue_work: work struct=0000000053de14fd
function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048110:
workqueue_queue_work: work struct=00000000ffe78fd2
function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048123:
workqueue_queue_work: work struct=00000000573429cf function=hub_event
workqueue=000000007b72f8bb req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048157:
workqueue_queue_work: work struct=000000005facda71 function=hub_event
workqueue=000000007b72f8bb req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048162:
workqueue_queue_work: work struct=0000000053de14fd
function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
     kworker/2:1-117     [002] d...   450.048166:
workqueue_queue_work: work struct=00000000ffe78fd2
function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2

The dmesg is similar:

[ 2798.450977] usb 1-3: USB disconnect, device number 25
[ 2798.450984] usb 1-3.1: USB disconnect, device number 26
[ 2798.452218] usb 1-3.5: USB disconnect, device number 27
[ 2798.521539] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
intr, status -71
[ 2798.587510] usb 4-2.1.4: Failed to set U1 timeout to 0x0,error code -71
[ 2798.594506] usb 4-2.1.4: Set SEL for device-initiated U1 failed.
[ 2798.601497] usb 4-2.1.4: Set SEL for device-initiated U2 failed.
[ 2798.601504] usb 4-2.1.4: usb_reset_and_verify_device Failed to disable LPM
[ 2798.677498] usb usb3-port2: over-current condition
[ 2799.209385] usb 4-2: USB disconnect, device number 2
[ 2799.209392] usb 4-2.1: USB disconnect, device number 3
[ 2799.209396] usb 4-2.1.3: USB disconnect, device number 4
[ 2799.302548] usb 4-2.1.4: USB disconnect, device number 5
[ 2799.633505] usb 4-2.1-port4: cannot disable (err = -110)
[ 2800.181325] usb usb4-port2: over-current condition
[ 2818.993944] xhci_hcd 0000:38:00.0: xHCI host controller not
responding, assume dead
[ 2818.993956] xhci_hcd 0000:38:00.0: HC died; cleaning up
[ 2819.126421] xhci_hcd 0000:38:00.0: remove, state 1
[ 2819.126431] usb usb4: USB disconnect, device number 1
[ 2819.154189] xhci_hcd 0000:38:00.0: USB bus 4 deregistered
[ 2819.154206] xhci_hcd 0000:38:00.0: remove, state 1
[ 2819.154211] usb usb3: USB disconnect, device number 1
[ 2819.154684] xhci_hcd 0000:38:00.0: Host halt failed, -19
[ 2819.154689] xhci_hcd 0000:38:00.0: Host not accessible, reset failed.
[ 2819.154900] xhci_hcd 0000:38:00.0: USB bus 3 deregistered
[ 2819.156059] pcieport 0000:03:00.0: can't change power state from
D3cold to D0 (config space inaccessible)
[ 2819.156709] pci_bus 0000:04: busn_res: [bus 04] is released
[ 2819.156776] pci_bus 0000:05: busn_res: [bus 05-37] is released
[ 2819.169419] pci_bus 0000:38: busn_res: [bus 38] is released
[ 2819.169491] pci_bus 0000:39: busn_res: [bus 39-6c] is released
[ 2819.169533] pci_bus 0000:03: busn_res: [bus 03-6c] is released
[ 2820.557517] usb 1-3: new high-speed USB device number 28 using xhci_hcd
[ 2820.708869] usb 1-3: New USB device found, idVendor=291a,
idProduct=5423, bcdDevice= 1.0a
[ 2820.708874] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2820.708876] usb 1-3: Product: 4-Port USB 2.0 Hub
[ 2820.708878] usb 1-3: Manufacturer: Generic
[ 2820.710578] hub 1-3:1.0: USB hub found
[ 2820.710816] hub 1-3:1.0: 5 ports detected
[ 2821.001436] usb 1-3.1: new high-speed USB device number 29 using xhci_hcd
[ 2821.104284] usb 1-3.1: New USB device found, idVendor=05e3,
idProduct=0610, bcdDevice= 6.55
[ 2821.104290] usb 1-3.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 2821.104294] usb 1-3.1: Product: USB2.1 Hub
[ 2821.104296] usb 1-3.1: Manufacturer: GenesysLogic
[ 2821.108236] hub 1-3.1:1.0: USB hub found
[ 2821.108521] hub 1-3.1:1.0: 4 ports detected
[ 2821.637686] hp_wmi: Unknown event_id - 131073 - 0x0
[ 2821.693397] usb 1-3.5: new high-speed USB device number 30 using xhci_hcd
[ 2821.796169] usb 1-3.5: New USB device found, idVendor=0bda,
idProduct=5450, bcdDevice= 1.01
[ 2821.796176] usb 1-3.5: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 2821.796179] usb 1-3.5: Product: BillBoard Device
[ 2821.796182] usb 1-3.5: Manufacturer: Realtek
[ 2822.157917] hp_wmi: Unknown event_id - 131073 - 0x0
[ 2829.665791] pci 0000:02:00.0: [8086:15d3] type 01 class 0x060400
[ 2829.665874] pci 0000:02:00.0: enabling Extended Tags
[ 2829.666011] pci 0000:02:00.0: supports D1 D2
[ 2829.666012] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.666391] pci 0000:03:00.0: [8086:15d3] type 01 class 0x060400
[ 2829.666458] pci 0000:03:00.0: enabling Extended Tags
[ 2829.666613] pci 0000:03:00.0: supports D1 D2
[ 2829.666613] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.666806] pci 0000:03:01.0: [8086:15d3] type 01 class 0x060400
[ 2829.666875] pci 0000:03:01.0: enabling Extended Tags
[ 2829.667024] pci 0000:03:01.0: supports D1 D2
[ 2829.667025] pci 0000:03:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.667211] pci 0000:03:02.0: [8086:15d3] type 01 class 0x060400
[ 2829.667295] pci 0000:03:02.0: enabling Extended Tags
[ 2829.667422] pci 0000:03:02.0: supports D1 D2
[ 2829.667423] pci 0000:03:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.667655] pci 0000:03:04.0: [8086:15d3] type 01 class 0x060400
[ 2829.667722] pci 0000:03:04.0: enabling Extended Tags
[ 2829.667868] pci 0000:03:04.0: supports D1 D2
[ 2829.667869] pci 0000:03:04.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.668067] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[ 2829.668078] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[ 2829.668108] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[ 2829.668156] pci 0000:03:00.0: PCI bridge to [bus 04]
[ 2829.668184] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[ 2829.668241] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[ 2829.668251] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[ 2829.668258] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[ 2829.668352] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
[ 2829.668372] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
[ 2829.668444] pci 0000:38:00.0: enabling Extended Tags
[ 2829.668578] pci 0000:38:00.0: supports D1 D2
[ 2829.668579] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 2829.668699] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31
.504 Gb/s with 8.0 GT/s PCIe x4 link)
[ 2829.668804] pci 0000:03:02.0: PCI bridge to [bus 38]
[ 2829.668815] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[ 2829.668874] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[ 2829.668884] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[ 2829.668891] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[ 2829.668925] pci_bus 0000:03: Allocating resources
[ 2829.668942] pci 0000:03:01.0: bridge window [io  0x1000-0x0fff] to
[bus 05-37] add_size 1000
[ 2829.668943] pci 0000:03:02.0: bridge window [io  0x1000-0x0fff] to
[bus 38] add_size 1000
[ 2829.668945] pci 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[ 2829.668946] pci 0000:03:04.0: bridge window [io  0x1000-0x0fff] to
[bus 39-6c] add_size 1000
[ 2829.668947] pci 0000:02:00.0: bridge window [io  0x1000-0x0fff] to
[bus 03-6c] add_size 4000
[ 2829.668949] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
[ 2829.668950] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
[ 2829.668951] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
[ 2829.668952] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
[ 2829.668955] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 2829.668955] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[ 2829.668956] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668957] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668957] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668958] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668959] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668960] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668961] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668961] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668963] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 2829.668963] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[ 2829.668964] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668965] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668966] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
[ 2829.668966] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
[ 2829.668967] pci 0000:03:00.0: PCI bridge to [bus 04]
[ 2829.668973] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[ 2829.668996] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[ 2829.669001] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[ 2829.669005] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[ 2829.669012] pci 0000:03:02.0: PCI bridge to [bus 38]
[ 2829.669017] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[ 2829.669026] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[ 2829.669031] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[ 2829.669035] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[ 2829.669041] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[ 2829.669046] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[ 2829.669050] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[ 2829.670507] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 2829.670512] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 3
[ 2829.671664] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
version 0x110 quirks 0x0000000200009810
[ 2829.671920] usb usb3: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.10
[ 2829.671922] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 2829.671923] usb usb3: Product: xHCI Host Controller
[ 2829.671924] usb usb3: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
[ 2829.671925] usb usb3: SerialNumber: 0000:38:00.0
[ 2829.672067] hub 3-0:1.0: USB hub found
[ 2829.672077] hub 3-0:1.0: 2 ports detected
[ 2829.672818] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 2829.672822] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 4
[ 2829.672824] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 2829.672850] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 5.10
[ 2829.672851] usb usb4: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 2829.672851] usb usb4: Product: xHCI Host Controller
[ 2829.672852] usb usb4: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
[ 2829.672853] usb usb4: SerialNumber: 0000:38:00.0
[ 2829.672977] hub 4-0:1.0: USB hub found
[ 2829.672985] hub 4-0:1.0: 2 ports detected
[ 2830.113812] usb 4-2: new SuperSpeedPlus Gen 2 USB device number 2
using xhci_hcd
[ 2830.137150] usb 4-2: New USB device found, idVendor=2900,
idProduct=8383, bcdDevice= 1.0a
[ 2830.137159] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2830.137165] usb 4-2: Product: 4-Port USB 3.0 Hub
[ 2830.137170] usb 4-2: Manufacturer: Generic
[ 2830.139872] hub 4-2:1.0: USB hub found
[ 2830.140153] hub 4-2:1.0: 4 ports detected
[ 2830.429717] usb 4-2.1: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
[ 2830.453599] usb 4-2.1: New USB device found, idVendor=05e3,
idProduct=0626, bcdDevice= 6.55
[ 2830.453606] usb 4-2.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 2830.453610] usb 4-2.1: Product: USB3.1 Hub
[ 2830.453613] usb 4-2.1: Manufacturer: GenesysLogic
[ 2830.456109] hub 4-2.1:1.0: USB hub found
[ 2830.456457] hub 4-2.1:1.0: 4 ports detected
[ 2830.745598] usb 4-2.1.4: new SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[ 2830.767264] usb 4-2.1.4: New USB device found, idVendor=058f,
idProduct=8468, bcdDevice= 1.00
[ 2830.767266] usb 4-2.1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 2830.767267] usb 4-2.1.4: Product: Mass Storage Device
[ 2830.767267] usb 4-2.1.4: Manufacturer: Generic
[ 2830.767268] usb 4-2.1.4: SerialNumber: 058F84688461
[ 2830.769494] usb-storage 4-2.1.4:1.0: USB Mass Storage device detected
[ 2830.769683] scsi host4: usb-storage 4-2.1.4:1.0
[ 2831.794370] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
  1.00 PQ: 0 ANSI: 6
[ 2831.794831] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
  1.08 PQ: 0 ANSI: 6
[ 2831.795344] sd 4:0:0:0: Attached scsi generic sg0 type 0
[ 2831.795741] sd 4:0:0:1: Attached scsi generic sg1 type 0
[ 2831.846323] sd 4:0:0:0: [sda] Attached SCSI removable disk
[ 2831.847114] sd 4:0:0:1: [sdb] Attached SCSI removable disk

Thanks
Yiyu Zhu


On Wed, Feb 10, 2021 at 10:47 PM Greg KH <greg@kroah.com> wrote:
>
> On Wed, Feb 10, 2021 at 06:31:56PM -0800, Yiyu Zhu wrote:
> > Hi,
> >
> > I have an Anker A8383 USB C hub with power delivery. I use the hub for
> > both charging and connecting to network. But when I unplug the hub, it
> > sometimes causes two kworker processes to occupy 100 % cpu time.
> > The issue will go away if I plug something back into the usbc port.
> > And the issue seems to persist through reboot.
> >
> > I am running kernel version 5.8.0-43-generic #49~20.04.1-Ubuntu SMP
>
> That is a very old kernel, and a distro-specific one.  Please try the
> latest 5.10.y release, or report the problem to Ubuntu as they are the
> only ones that can support that unknown kernel.
>
> good luck!
>
> greg k-h

Re: kworker takes 100% core after unplugging usb c hub

[Greg KH]

On Thu, Feb 11, 2021 at 02:10:53AM -0800, Yiyu Zhu wrote:
> Hi Greg,
> 
> I just updated the kernel to 5.10.15-051015-generic. (It is the
> ubuntu's mainline build. I am not sure if that matters.)
> 
> The issue is still there but with a slightly different behavior. There
> is still high cpu usage but the two kworkers seem to take turns.
> 
> 01:18:49 AM     0       117    0.00   87.00    0.00   13.00   87.00
>  2  kworker/2:1+usb_hub_wq
> 01:18:50 AM     0       117    0.00   87.00    0.00   12.00   87.00
>  2  kworker/2:1+pm
> 
> The trace is now filled with:
> 
>      kworker/2:1-117     [002] d...   450.048063:
> workqueue_queue_work: work struct=00000000573429cf function=hub_event
> workqueue=000000007b72f8bb req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048097:
> workqueue_queue_work: work struct=000000005facda71 function=hub_event
> workqueue=000000007b72f8bb req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048104:
> workqueue_queue_work: work struct=0000000053de14fd
> function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048110:
> workqueue_queue_work: work struct=00000000ffe78fd2
> function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048123:
> workqueue_queue_work: work struct=00000000573429cf function=hub_event
> workqueue=000000007b72f8bb req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048157:
> workqueue_queue_work: work struct=000000005facda71 function=hub_event
> workqueue=000000007b72f8bb req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048162:
> workqueue_queue_work: work struct=0000000053de14fd
> function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
>      kworker/2:1-117     [002] d...   450.048166:
> workqueue_queue_work: work struct=00000000ffe78fd2
> function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
> 
> The dmesg is similar:
> 
> [ 2798.450977] usb 1-3: USB disconnect, device number 25
> [ 2798.450984] usb 1-3.1: USB disconnect, device number 26
> [ 2798.452218] usb 1-3.5: USB disconnect, device number 27
> [ 2798.521539] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
> intr, status -71
> [ 2798.587510] usb 4-2.1.4: Failed to set U1 timeout to 0x0,error code -71
> [ 2798.594506] usb 4-2.1.4: Set SEL for device-initiated U1 failed.
> [ 2798.601497] usb 4-2.1.4: Set SEL for device-initiated U2 failed.
> [ 2798.601504] usb 4-2.1.4: usb_reset_and_verify_device Failed to disable LPM
> [ 2798.677498] usb usb3-port2: over-current condition
> [ 2799.209385] usb 4-2: USB disconnect, device number 2
> [ 2799.209392] usb 4-2.1: USB disconnect, device number 3
> [ 2799.209396] usb 4-2.1.3: USB disconnect, device number 4
> [ 2799.302548] usb 4-2.1.4: USB disconnect, device number 5
> [ 2799.633505] usb 4-2.1-port4: cannot disable (err = -110)
> [ 2800.181325] usb usb4-port2: over-current condition
> [ 2818.993944] xhci_hcd 0000:38:00.0: xHCI host controller not
> responding, assume dead
> [ 2818.993956] xhci_hcd 0000:38:00.0: HC died; cleaning up
> [ 2819.126421] xhci_hcd 0000:38:00.0: remove, state 1
> [ 2819.126431] usb usb4: USB disconnect, device number 1
> [ 2819.154189] xhci_hcd 0000:38:00.0: USB bus 4 deregistered
> [ 2819.154206] xhci_hcd 0000:38:00.0: remove, state 1
> [ 2819.154211] usb usb3: USB disconnect, device number 1
> [ 2819.154684] xhci_hcd 0000:38:00.0: Host halt failed, -19
> [ 2819.154689] xhci_hcd 0000:38:00.0: Host not accessible, reset failed.
> [ 2819.154900] xhci_hcd 0000:38:00.0: USB bus 3 deregistered
> [ 2819.156059] pcieport 0000:03:00.0: can't change power state from
> D3cold to D0 (config space inaccessible)
> [ 2819.156709] pci_bus 0000:04: busn_res: [bus 04] is released
> [ 2819.156776] pci_bus 0000:05: busn_res: [bus 05-37] is released
> [ 2819.169419] pci_bus 0000:38: busn_res: [bus 38] is released
> [ 2819.169491] pci_bus 0000:39: busn_res: [bus 39-6c] is released
> [ 2819.169533] pci_bus 0000:03: busn_res: [bus 03-6c] is released
> [ 2820.557517] usb 1-3: new high-speed USB device number 28 using xhci_hcd
> [ 2820.708869] usb 1-3: New USB device found, idVendor=291a,
> idProduct=5423, bcdDevice= 1.0a
> [ 2820.708874] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [ 2820.708876] usb 1-3: Product: 4-Port USB 2.0 Hub
> [ 2820.708878] usb 1-3: Manufacturer: Generic
> [ 2820.710578] hub 1-3:1.0: USB hub found
> [ 2820.710816] hub 1-3:1.0: 5 ports detected
> [ 2821.001436] usb 1-3.1: new high-speed USB device number 29 using xhci_hcd
> [ 2821.104284] usb 1-3.1: New USB device found, idVendor=05e3,
> idProduct=0610, bcdDevice= 6.55
> [ 2821.104290] usb 1-3.1: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [ 2821.104294] usb 1-3.1: Product: USB2.1 Hub
> [ 2821.104296] usb 1-3.1: Manufacturer: GenesysLogic
> [ 2821.108236] hub 1-3.1:1.0: USB hub found
> [ 2821.108521] hub 1-3.1:1.0: 4 ports detected
> [ 2821.637686] hp_wmi: Unknown event_id - 131073 - 0x0
> [ 2821.693397] usb 1-3.5: new high-speed USB device number 30 using xhci_hcd
> [ 2821.796169] usb 1-3.5: New USB device found, idVendor=0bda,
> idProduct=5450, bcdDevice= 1.01
> [ 2821.796176] usb 1-3.5: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [ 2821.796179] usb 1-3.5: Product: BillBoard Device
> [ 2821.796182] usb 1-3.5: Manufacturer: Realtek
> [ 2822.157917] hp_wmi: Unknown event_id - 131073 - 0x0
> [ 2829.665791] pci 0000:02:00.0: [8086:15d3] type 01 class 0x060400
> [ 2829.665874] pci 0000:02:00.0: enabling Extended Tags
> [ 2829.666011] pci 0000:02:00.0: supports D1 D2
> [ 2829.666012] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.666391] pci 0000:03:00.0: [8086:15d3] type 01 class 0x060400
> [ 2829.666458] pci 0000:03:00.0: enabling Extended Tags
> [ 2829.666613] pci 0000:03:00.0: supports D1 D2
> [ 2829.666613] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.666806] pci 0000:03:01.0: [8086:15d3] type 01 class 0x060400
> [ 2829.666875] pci 0000:03:01.0: enabling Extended Tags
> [ 2829.667024] pci 0000:03:01.0: supports D1 D2
> [ 2829.667025] pci 0000:03:01.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.667211] pci 0000:03:02.0: [8086:15d3] type 01 class 0x060400
> [ 2829.667295] pci 0000:03:02.0: enabling Extended Tags
> [ 2829.667422] pci 0000:03:02.0: supports D1 D2
> [ 2829.667423] pci 0000:03:02.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.667655] pci 0000:03:04.0: [8086:15d3] type 01 class 0x060400
> [ 2829.667722] pci 0000:03:04.0: enabling Extended Tags
> [ 2829.667868] pci 0000:03:04.0: supports D1 D2
> [ 2829.667869] pci 0000:03:04.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.668067] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
> [ 2829.668078] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
> [ 2829.668108] pci 0000:02:00.0:   bridge window [mem
> 0x2f90000000-0x2fd9ffffff 64bit pref]
> [ 2829.668156] pci 0000:03:00.0: PCI bridge to [bus 04]
> [ 2829.668184] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
> [ 2829.668241] pci 0000:03:01.0: PCI bridge to [bus 05-37]
> [ 2829.668251] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
> [ 2829.668258] pci 0000:03:01.0:   bridge window [mem
> 0x2f90000000-0x2fafffffff 64bit pref]
> [ 2829.668352] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
> [ 2829.668372] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
> [ 2829.668444] pci 0000:38:00.0: enabling Extended Tags
> [ 2829.668578] pci 0000:38:00.0: supports D1 D2
> [ 2829.668579] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> [ 2829.668699] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
> limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31
> .504 Gb/s with 8.0 GT/s PCIe x4 link)
> [ 2829.668804] pci 0000:03:02.0: PCI bridge to [bus 38]
> [ 2829.668815] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
> [ 2829.668874] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
> [ 2829.668884] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
> [ 2829.668891] pci 0000:03:04.0:   bridge window [mem
> 0x2fb0000000-0x2fd9ffffff 64bit pref]
> [ 2829.668925] pci_bus 0000:03: Allocating resources
> [ 2829.668942] pci 0000:03:01.0: bridge window [io  0x1000-0x0fff] to
> [bus 05-37] add_size 1000
> [ 2829.668943] pci 0000:03:02.0: bridge window [io  0x1000-0x0fff] to
> [bus 38] add_size 1000
> [ 2829.668945] pci 0000:03:02.0: bridge window [mem
> 0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
> add_align 100000
> [ 2829.668946] pci 0000:03:04.0: bridge window [io  0x1000-0x0fff] to
> [bus 39-6c] add_size 1000
> [ 2829.668947] pci 0000:02:00.0: bridge window [io  0x1000-0x0fff] to
> [bus 03-6c] add_size 4000
> [ 2829.668949] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
> [ 2829.668950] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
> [ 2829.668951] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
> [ 2829.668952] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
> [ 2829.668955] pci 0000:03:02.0: BAR 15: no space for [mem size
> 0x00200000 64bit pref]
> [ 2829.668955] pci 0000:03:02.0: BAR 15: failed to assign [mem size
> 0x00200000 64bit pref]
> [ 2829.668956] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668957] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668957] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668958] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668959] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668960] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668961] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668961] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668963] pci 0000:03:02.0: BAR 15: no space for [mem size
> 0x00200000 64bit pref]
> [ 2829.668963] pci 0000:03:02.0: BAR 15: failed to assign [mem size
> 0x00200000 64bit pref]
> [ 2829.668964] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668965] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668966] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
> [ 2829.668966] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
> [ 2829.668967] pci 0000:03:00.0: PCI bridge to [bus 04]
> [ 2829.668973] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
> [ 2829.668996] pci 0000:03:01.0: PCI bridge to [bus 05-37]
> [ 2829.669001] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
> [ 2829.669005] pci 0000:03:01.0:   bridge window [mem
> 0x2f90000000-0x2fafffffff 64bit pref]
> [ 2829.669012] pci 0000:03:02.0: PCI bridge to [bus 38]
> [ 2829.669017] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
> [ 2829.669026] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
> [ 2829.669031] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
> [ 2829.669035] pci 0000:03:04.0:   bridge window [mem
> 0x2fb0000000-0x2fd9ffffff 64bit pref]
> [ 2829.669041] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
> [ 2829.669046] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
> [ 2829.669050] pci 0000:02:00.0:   bridge window [mem
> 0x2f90000000-0x2fd9ffffff 64bit pref]
> [ 2829.670507] xhci_hcd 0000:38:00.0: xHCI Host Controller
> [ 2829.670512] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
> bus number 3
> [ 2829.671664] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
> version 0x110 quirks 0x0000000200009810
> [ 2829.671920] usb usb3: New USB device found, idVendor=1d6b,
> idProduct=0002, bcdDevice= 5.10
> [ 2829.671922] usb usb3: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [ 2829.671923] usb usb3: Product: xHCI Host Controller
> [ 2829.671924] usb usb3: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
> [ 2829.671925] usb usb3: SerialNumber: 0000:38:00.0
> [ 2829.672067] hub 3-0:1.0: USB hub found
> [ 2829.672077] hub 3-0:1.0: 2 ports detected
> [ 2829.672818] xhci_hcd 0000:38:00.0: xHCI Host Controller
> [ 2829.672822] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
> bus number 4
> [ 2829.672824] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
> [ 2829.672850] usb usb4: New USB device found, idVendor=1d6b,
> idProduct=0003, bcdDevice= 5.10
> [ 2829.672851] usb usb4: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [ 2829.672851] usb usb4: Product: xHCI Host Controller
> [ 2829.672852] usb usb4: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
> [ 2829.672853] usb usb4: SerialNumber: 0000:38:00.0
> [ 2829.672977] hub 4-0:1.0: USB hub found
> [ 2829.672985] hub 4-0:1.0: 2 ports detected
> [ 2830.113812] usb 4-2: new SuperSpeedPlus Gen 2 USB device number 2
> using xhci_hcd
> [ 2830.137150] usb 4-2: New USB device found, idVendor=2900,
> idProduct=8383, bcdDevice= 1.0a
> [ 2830.137159] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [ 2830.137165] usb 4-2: Product: 4-Port USB 3.0 Hub
> [ 2830.137170] usb 4-2: Manufacturer: Generic
> [ 2830.139872] hub 4-2:1.0: USB hub found
> [ 2830.140153] hub 4-2:1.0: 4 ports detected
> [ 2830.429717] usb 4-2.1: new SuperSpeed Gen 1 USB device number 3
> using xhci_hcd
> [ 2830.453599] usb 4-2.1: New USB device found, idVendor=05e3,
> idProduct=0626, bcdDevice= 6.55
> [ 2830.453606] usb 4-2.1: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [ 2830.453610] usb 4-2.1: Product: USB3.1 Hub
> [ 2830.453613] usb 4-2.1: Manufacturer: GenesysLogic
> [ 2830.456109] hub 4-2.1:1.0: USB hub found
> [ 2830.456457] hub 4-2.1:1.0: 4 ports detected
> [ 2830.745598] usb 4-2.1.4: new SuperSpeed Gen 1 USB device number 4
> using xhci_hcd
> [ 2830.767264] usb 4-2.1.4: New USB device found, idVendor=058f,
> idProduct=8468, bcdDevice= 1.00
> [ 2830.767266] usb 4-2.1.4: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [ 2830.767267] usb 4-2.1.4: Product: Mass Storage Device
> [ 2830.767267] usb 4-2.1.4: Manufacturer: Generic
> [ 2830.767268] usb 4-2.1.4: SerialNumber: 058F84688461
> [ 2830.769494] usb-storage 4-2.1.4:1.0: USB Mass Storage device detected
> [ 2830.769683] scsi host4: usb-storage 4-2.1.4:1.0
> [ 2831.794370] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
>   1.00 PQ: 0 ANSI: 6
> [ 2831.794831] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
>   1.08 PQ: 0 ANSI: 6
> [ 2831.795344] sd 4:0:0:0: Attached scsi generic sg0 type 0
> [ 2831.795741] sd 4:0:0:1: Attached scsi generic sg1 type 0
> [ 2831.846323] sd 4:0:0:0: [sda] Attached SCSI removable disk
> [ 2831.847114] sd 4:0:0:1: [sdb] Attached SCSI removable disk

Looks like your hub is disconnecting and then reconnecting over and over
and over.  Perhaps it's an electrical issue?  Not much the kernel can do
about that.

Try a better cable, or a different hub.

thanks,

greg k-h

Re: kworker takes 100% core after unplugging usb c hub

[Yiyu Zhu]

I was trying to unplug the hub manually so that I can trigger this
issue. The kworker only shows up when the hub is actually
disconnected. They will be gone if any thing is connected back into
the port.

The hub works normally when it is connected. And no additional dmesg is printed.

On Thu, Feb 11, 2021 at 2:37 AM Greg KH <greg@kroah.com> wrote:
>
> On Thu, Feb 11, 2021 at 02:10:53AM -0800, Yiyu Zhu wrote:
> > Hi Greg,
> >
> > I just updated the kernel to 5.10.15-051015-generic. (It is the
> > ubuntu's mainline build. I am not sure if that matters.)
> >
> > The issue is still there but with a slightly different behavior. There
> > is still high cpu usage but the two kworkers seem to take turns.
> >
> > 01:18:49 AM     0       117    0.00   87.00    0.00   13.00   87.00
> >  2  kworker/2:1+usb_hub_wq
> > 01:18:50 AM     0       117    0.00   87.00    0.00   12.00   87.00
> >  2  kworker/2:1+pm
> >
> > The trace is now filled with:
> >
> >      kworker/2:1-117     [002] d...   450.048063:
> > workqueue_queue_work: work struct=00000000573429cf function=hub_event
> > workqueue=000000007b72f8bb req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048097:
> > workqueue_queue_work: work struct=000000005facda71 function=hub_event
> > workqueue=000000007b72f8bb req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048104:
> > workqueue_queue_work: work struct=0000000053de14fd
> > function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048110:
> > workqueue_queue_work: work struct=00000000ffe78fd2
> > function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048123:
> > workqueue_queue_work: work struct=00000000573429cf function=hub_event
> > workqueue=000000007b72f8bb req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048157:
> > workqueue_queue_work: work struct=000000005facda71 function=hub_event
> > workqueue=000000007b72f8bb req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048162:
> > workqueue_queue_work: work struct=0000000053de14fd
> > function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
> >      kworker/2:1-117     [002] d...   450.048166:
> > workqueue_queue_work: work struct=00000000ffe78fd2
> > function=pm_runtime_work workqueue=00000000a24828a0 req_cpu=8192 cpu=2
> >
> > The dmesg is similar:
> >
> > [ 2798.450977] usb 1-3: USB disconnect, device number 25
> > [ 2798.450984] usb 1-3.1: USB disconnect, device number 26
> > [ 2798.452218] usb 1-3.5: USB disconnect, device number 27
> > [ 2798.521539] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
> > intr, status -71
> > [ 2798.587510] usb 4-2.1.4: Failed to set U1 timeout to 0x0,error code -71
> > [ 2798.594506] usb 4-2.1.4: Set SEL for device-initiated U1 failed.
> > [ 2798.601497] usb 4-2.1.4: Set SEL for device-initiated U2 failed.
> > [ 2798.601504] usb 4-2.1.4: usb_reset_and_verify_device Failed to disable LPM
> > [ 2798.677498] usb usb3-port2: over-current condition
> > [ 2799.209385] usb 4-2: USB disconnect, device number 2
> > [ 2799.209392] usb 4-2.1: USB disconnect, device number 3
> > [ 2799.209396] usb 4-2.1.3: USB disconnect, device number 4
> > [ 2799.302548] usb 4-2.1.4: USB disconnect, device number 5
> > [ 2799.633505] usb 4-2.1-port4: cannot disable (err = -110)
> > [ 2800.181325] usb usb4-port2: over-current condition
> > [ 2818.993944] xhci_hcd 0000:38:00.0: xHCI host controller not
> > responding, assume dead
> > [ 2818.993956] xhci_hcd 0000:38:00.0: HC died; cleaning up
> > [ 2819.126421] xhci_hcd 0000:38:00.0: remove, state 1
> > [ 2819.126431] usb usb4: USB disconnect, device number 1
> > [ 2819.154189] xhci_hcd 0000:38:00.0: USB bus 4 deregistered
> > [ 2819.154206] xhci_hcd 0000:38:00.0: remove, state 1
> > [ 2819.154211] usb usb3: USB disconnect, device number 1
> > [ 2819.154684] xhci_hcd 0000:38:00.0: Host halt failed, -19
> > [ 2819.154689] xhci_hcd 0000:38:00.0: Host not accessible, reset failed.
> > [ 2819.154900] xhci_hcd 0000:38:00.0: USB bus 3 deregistered
> > [ 2819.156059] pcieport 0000:03:00.0: can't change power state from
> > D3cold to D0 (config space inaccessible)
> > [ 2819.156709] pci_bus 0000:04: busn_res: [bus 04] is released
> > [ 2819.156776] pci_bus 0000:05: busn_res: [bus 05-37] is released
> > [ 2819.169419] pci_bus 0000:38: busn_res: [bus 38] is released
> > [ 2819.169491] pci_bus 0000:39: busn_res: [bus 39-6c] is released
> > [ 2819.169533] pci_bus 0000:03: busn_res: [bus 03-6c] is released
> > [ 2820.557517] usb 1-3: new high-speed USB device number 28 using xhci_hcd
> > [ 2820.708869] usb 1-3: New USB device found, idVendor=291a,
> > idProduct=5423, bcdDevice= 1.0a
> > [ 2820.708874] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > [ 2820.708876] usb 1-3: Product: 4-Port USB 2.0 Hub
> > [ 2820.708878] usb 1-3: Manufacturer: Generic
> > [ 2820.710578] hub 1-3:1.0: USB hub found
> > [ 2820.710816] hub 1-3:1.0: 5 ports detected
> > [ 2821.001436] usb 1-3.1: new high-speed USB device number 29 using xhci_hcd
> > [ 2821.104284] usb 1-3.1: New USB device found, idVendor=05e3,
> > idProduct=0610, bcdDevice= 6.55
> > [ 2821.104290] usb 1-3.1: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=0
> > [ 2821.104294] usb 1-3.1: Product: USB2.1 Hub
> > [ 2821.104296] usb 1-3.1: Manufacturer: GenesysLogic
> > [ 2821.108236] hub 1-3.1:1.0: USB hub found
> > [ 2821.108521] hub 1-3.1:1.0: 4 ports detected
> > [ 2821.637686] hp_wmi: Unknown event_id - 131073 - 0x0
> > [ 2821.693397] usb 1-3.5: new high-speed USB device number 30 using xhci_hcd
> > [ 2821.796169] usb 1-3.5: New USB device found, idVendor=0bda,
> > idProduct=5450, bcdDevice= 1.01
> > [ 2821.796176] usb 1-3.5: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=0
> > [ 2821.796179] usb 1-3.5: Product: BillBoard Device
> > [ 2821.796182] usb 1-3.5: Manufacturer: Realtek
> > [ 2822.157917] hp_wmi: Unknown event_id - 131073 - 0x0
> > [ 2829.665791] pci 0000:02:00.0: [8086:15d3] type 01 class 0x060400
> > [ 2829.665874] pci 0000:02:00.0: enabling Extended Tags
> > [ 2829.666011] pci 0000:02:00.0: supports D1 D2
> > [ 2829.666012] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.666391] pci 0000:03:00.0: [8086:15d3] type 01 class 0x060400
> > [ 2829.666458] pci 0000:03:00.0: enabling Extended Tags
> > [ 2829.666613] pci 0000:03:00.0: supports D1 D2
> > [ 2829.666613] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.666806] pci 0000:03:01.0: [8086:15d3] type 01 class 0x060400
> > [ 2829.666875] pci 0000:03:01.0: enabling Extended Tags
> > [ 2829.667024] pci 0000:03:01.0: supports D1 D2
> > [ 2829.667025] pci 0000:03:01.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.667211] pci 0000:03:02.0: [8086:15d3] type 01 class 0x060400
> > [ 2829.667295] pci 0000:03:02.0: enabling Extended Tags
> > [ 2829.667422] pci 0000:03:02.0: supports D1 D2
> > [ 2829.667423] pci 0000:03:02.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.667655] pci 0000:03:04.0: [8086:15d3] type 01 class 0x060400
> > [ 2829.667722] pci 0000:03:04.0: enabling Extended Tags
> > [ 2829.667868] pci 0000:03:04.0: supports D1 D2
> > [ 2829.667869] pci 0000:03:04.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.668067] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
> > [ 2829.668078] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
> > [ 2829.668108] pci 0000:02:00.0:   bridge window [mem
> > 0x2f90000000-0x2fd9ffffff 64bit pref]
> > [ 2829.668156] pci 0000:03:00.0: PCI bridge to [bus 04]
> > [ 2829.668184] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
> > [ 2829.668241] pci 0000:03:01.0: PCI bridge to [bus 05-37]
> > [ 2829.668251] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
> > [ 2829.668258] pci 0000:03:01.0:   bridge window [mem
> > 0x2f90000000-0x2fafffffff 64bit pref]
> > [ 2829.668352] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
> > [ 2829.668372] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
> > [ 2829.668444] pci 0000:38:00.0: enabling Extended Tags
> > [ 2829.668578] pci 0000:38:00.0: supports D1 D2
> > [ 2829.668579] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> > [ 2829.668699] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
> > limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31
> > .504 Gb/s with 8.0 GT/s PCIe x4 link)
> > [ 2829.668804] pci 0000:03:02.0: PCI bridge to [bus 38]
> > [ 2829.668815] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
> > [ 2829.668874] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
> > [ 2829.668884] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
> > [ 2829.668891] pci 0000:03:04.0:   bridge window [mem
> > 0x2fb0000000-0x2fd9ffffff 64bit pref]
> > [ 2829.668925] pci_bus 0000:03: Allocating resources
> > [ 2829.668942] pci 0000:03:01.0: bridge window [io  0x1000-0x0fff] to
> > [bus 05-37] add_size 1000
> > [ 2829.668943] pci 0000:03:02.0: bridge window [io  0x1000-0x0fff] to
> > [bus 38] add_size 1000
> > [ 2829.668945] pci 0000:03:02.0: bridge window [mem
> > 0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
> > add_align 100000
> > [ 2829.668946] pci 0000:03:04.0: bridge window [io  0x1000-0x0fff] to
> > [bus 39-6c] add_size 1000
> > [ 2829.668947] pci 0000:02:00.0: bridge window [io  0x1000-0x0fff] to
> > [bus 03-6c] add_size 4000
> > [ 2829.668949] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
> > [ 2829.668950] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
> > [ 2829.668951] pci 0000:02:00.0: BAR 13: no space for [io  size 0x4000]
> > [ 2829.668952] pci 0000:02:00.0: BAR 13: failed to assign [io  size 0x4000]
> > [ 2829.668955] pci 0000:03:02.0: BAR 15: no space for [mem size
> > 0x00200000 64bit pref]
> > [ 2829.668955] pci 0000:03:02.0: BAR 15: failed to assign [mem size
> > 0x00200000 64bit pref]
> > [ 2829.668956] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668957] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668957] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668958] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668959] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668960] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668961] pci 0000:03:04.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668961] pci 0000:03:04.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668963] pci 0000:03:02.0: BAR 15: no space for [mem size
> > 0x00200000 64bit pref]
> > [ 2829.668963] pci 0000:03:02.0: BAR 15: failed to assign [mem size
> > 0x00200000 64bit pref]
> > [ 2829.668964] pci 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668965] pci 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668966] pci 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
> > [ 2829.668966] pci 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
> > [ 2829.668967] pci 0000:03:00.0: PCI bridge to [bus 04]
> > [ 2829.668973] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
> > [ 2829.668996] pci 0000:03:01.0: PCI bridge to [bus 05-37]
> > [ 2829.669001] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
> > [ 2829.669005] pci 0000:03:01.0:   bridge window [mem
> > 0x2f90000000-0x2fafffffff 64bit pref]
> > [ 2829.669012] pci 0000:03:02.0: PCI bridge to [bus 38]
> > [ 2829.669017] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
> > [ 2829.669026] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
> > [ 2829.669031] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
> > [ 2829.669035] pci 0000:03:04.0:   bridge window [mem
> > 0x2fb0000000-0x2fd9ffffff 64bit pref]
> > [ 2829.669041] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
> > [ 2829.669046] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
> > [ 2829.669050] pci 0000:02:00.0:   bridge window [mem
> > 0x2f90000000-0x2fd9ffffff 64bit pref]
> > [ 2829.670507] xhci_hcd 0000:38:00.0: xHCI Host Controller
> > [ 2829.670512] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
> > bus number 3
> > [ 2829.671664] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
> > version 0x110 quirks 0x0000000200009810
> > [ 2829.671920] usb usb3: New USB device found, idVendor=1d6b,
> > idProduct=0002, bcdDevice= 5.10
> > [ 2829.671922] usb usb3: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [ 2829.671923] usb usb3: Product: xHCI Host Controller
> > [ 2829.671924] usb usb3: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
> > [ 2829.671925] usb usb3: SerialNumber: 0000:38:00.0
> > [ 2829.672067] hub 3-0:1.0: USB hub found
> > [ 2829.672077] hub 3-0:1.0: 2 ports detected
> > [ 2829.672818] xhci_hcd 0000:38:00.0: xHCI Host Controller
> > [ 2829.672822] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
> > bus number 4
> > [ 2829.672824] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
> > [ 2829.672850] usb usb4: New USB device found, idVendor=1d6b,
> > idProduct=0003, bcdDevice= 5.10
> > [ 2829.672851] usb usb4: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [ 2829.672851] usb usb4: Product: xHCI Host Controller
> > [ 2829.672852] usb usb4: Manufacturer: Linux 5.10.15-051015-generic xhci-hcd
> > [ 2829.672853] usb usb4: SerialNumber: 0000:38:00.0
> > [ 2829.672977] hub 4-0:1.0: USB hub found
> > [ 2829.672985] hub 4-0:1.0: 2 ports detected
> > [ 2830.113812] usb 4-2: new SuperSpeedPlus Gen 2 USB device number 2
> > using xhci_hcd
> > [ 2830.137150] usb 4-2: New USB device found, idVendor=2900,
> > idProduct=8383, bcdDevice= 1.0a
> > [ 2830.137159] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > [ 2830.137165] usb 4-2: Product: 4-Port USB 3.0 Hub
> > [ 2830.137170] usb 4-2: Manufacturer: Generic
> > [ 2830.139872] hub 4-2:1.0: USB hub found
> > [ 2830.140153] hub 4-2:1.0: 4 ports detected
> > [ 2830.429717] usb 4-2.1: new SuperSpeed Gen 1 USB device number 3
> > using xhci_hcd
> > [ 2830.453599] usb 4-2.1: New USB device found, idVendor=05e3,
> > idProduct=0626, bcdDevice= 6.55
> > [ 2830.453606] usb 4-2.1: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=0
> > [ 2830.453610] usb 4-2.1: Product: USB3.1 Hub
> > [ 2830.453613] usb 4-2.1: Manufacturer: GenesysLogic
> > [ 2830.456109] hub 4-2.1:1.0: USB hub found
> > [ 2830.456457] hub 4-2.1:1.0: 4 ports detected
> > [ 2830.745598] usb 4-2.1.4: new SuperSpeed Gen 1 USB device number 4
> > using xhci_hcd
> > [ 2830.767264] usb 4-2.1.4: New USB device found, idVendor=058f,
> > idProduct=8468, bcdDevice= 1.00
> > [ 2830.767266] usb 4-2.1.4: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=3
> > [ 2830.767267] usb 4-2.1.4: Product: Mass Storage Device
> > [ 2830.767267] usb 4-2.1.4: Manufacturer: Generic
> > [ 2830.767268] usb 4-2.1.4: SerialNumber: 058F84688461
> > [ 2830.769494] usb-storage 4-2.1.4:1.0: USB Mass Storage device detected
> > [ 2830.769683] scsi host4: usb-storage 4-2.1.4:1.0
> > [ 2831.794370] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
> >   1.00 PQ: 0 ANSI: 6
> > [ 2831.794831] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
> >   1.08 PQ: 0 ANSI: 6
> > [ 2831.795344] sd 4:0:0:0: Attached scsi generic sg0 type 0
> > [ 2831.795741] sd 4:0:0:1: Attached scsi generic sg1 type 0
> > [ 2831.846323] sd 4:0:0:0: [sda] Attached SCSI removable disk
> > [ 2831.847114] sd 4:0:0:1: [sdb] Attached SCSI removable disk
>
> Looks like your hub is disconnecting and then reconnecting over and over
> and over.  Perhaps it's an electrical issue?  Not much the kernel can do
> about that.
>
> Try a better cable, or a different hub.
>
> thanks,
>
> greg k-h

Re: kworker takes 100% core after unplugging usb c hub

[Mathias Nyman]

Hi

On 12.2.2021 0.11, Yiyu Zhu wrote:
> I was trying to unplug the hub manually so that I can trigger this
> issue. The kworker only shows up when the hub is actually
> disconnected. They will be gone if any thing is connected back into
> the port.
> 
> The hub works normally when it is connected. And no additional dmesg is printed.

Could you add usbcore dynamic debug, it should show more details about hub activity.

mount -t debugfs none /sys/kernel/debug
echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control

>>> [ 2798.677498] usb usb3-port2: over-current condition

hub reports overcurrent condition, worth keeping in mind.

>>> [ 2799.209385] usb 4-2: USB disconnect, device number 2
>>> [ 2799.209392] usb 4-2.1: USB disconnect, device number 3
>>> [ 2799.209396] usb 4-2.1.3: USB disconnect, device number 4
>>> [ 2799.302548] usb 4-2.1.4: USB disconnect, device number 5
>>> [ 2799.633505] usb 4-2.1-port4: cannot disable (err = -110)
>>> [ 2800.181325] usb usb4-port2: over-current condition
>>> [ 2818.993944] xhci_hcd 0000:38:00.0: xHCI host controller not
>>> responding, assume dead
>>> [ 2818.993956] xhci_hcd 0000:38:00.0: HC died; cleaning up
>>> [ 2819.126421] xhci_hcd 0000:38:00.0: remove, state 1
>>> [ 2819.126431] usb usb4: USB disconnect, device number 1
>>> [ 2819.154189] xhci_hcd 0000:38:00.0: USB bus 4 deregistered
>>> [ 2819.154206] xhci_hcd 0000:38:00.0: remove, state 1
>>> [ 2819.154211] usb usb3: USB disconnect, device number 1
>>> [ 2819.154684] xhci_hcd 0000:38:00.0: Host halt failed, -19
>>> [ 2819.154689] xhci_hcd 0000:38:00.0: Host not accessible, reset failed.
>>> [ 2819.154900] xhci_hcd 0000:38:00.0: USB bus 3 deregistered
>>> [ 2819.156059] pcieport 0000:03:00.0: can't change power state from
>>> D3cold to D0 (config space inaccessible)
>>> [ 2819.156709] pci_bus 0000:04: busn_res: [bus 04] is released
>>> [ 2819.156776] pci_bus 0000:05: busn_res: [bus 05-37] is released
>>> [ 2819.169419] pci_bus 0000:38: busn_res: [bus 38] is released
>>> [ 2819.169491] pci_bus 0000:39: busn_res: [bus 39-6c] is released
>>> [ 2819.169533] pci_bus 0000:03: busn_res: [bus 03-6c] is released

Is this xHC contoller in a Alpine Ridge/Titan Ridge/Maple Ridge based system
that has runtime PM enabled by default, and whole xHC controller
disappears from PCI bus when last device is disconnected?
(check with lspci -nn)

Does it help if another USB device is connected to a different
roothub port of this xHC while disconnecting the hub?
Or does just disabling runtime PM for this xhci help?

Thanks
Mathias

Re: kworker takes 100% core after unplugging usb c hub

[Yiyu Zhu]

Hi Mathias,

Hi

>
> Could you add usbcore dynamic debug, it should show more details about hub activity.
>
> mount -t debugfs none /sys/kernel/debug
> echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control
>
Here are the dmesg after I enabled dynamic debug.

(at hub connection)
[18746.363125] usb 1-3: new high-speed USB device number 7 using xhci_hcd
[18747.635125] usb 1-3: new high-speed USB device number 8 using xhci_hcd
[18747.790174] usb 1-3: New USB device found, idVendor=291a,
idProduct=5423, bcdDevice= 1.0a
[18747.790185] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[18747.790190] usb 1-3: Product: 4-Port USB 2.0 Hub
[18747.790194] usb 1-3: Manufacturer: Generic
[18747.791444] hub 1-3:1.0: USB hub found
[18747.791644] hub 1-3:1.0: 5 ports detected
[18748.087060] usb 1-3.1: new high-speed USB device number 9 using xhci_hcd
[18748.193599] usb 1-3.1: New USB device found, idVendor=05e3,
idProduct=0610, bcdDevice= 6.55
[18748.193611] usb 1-3.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[18748.193615] usb 1-3.1: Product: USB2.1 Hub
[18748.193618] usb 1-3.1: Manufacturer: GenesysLogic
[18748.195938] hub 1-3.1:1.0: USB hub found
[18748.196221] hub 1-3.1:1.0: 4 ports detected
[18748.531325] hp_wmi: Unknown event_id - 131073 - 0x0
[18748.607073] usb 1-3.5: new high-speed USB device number 10 using xhci_hcd
[18748.713602] usb 1-3.5: New USB device found, idVendor=0bda,
idProduct=5450, bcdDevice= 1.01
[18748.713608] usb 1-3.5: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[18748.713610] usb 1-3.5: Product: BillBoard Device
[18748.713612] usb 1-3.5: Manufacturer: Realtek
[18749.083366] hp_wmi: Unknown event_id - 131073 - 0x0
[18749.099460] pci 0000:02:00.0: [8086:15d3] type 01 class 0x060400
[18749.099544] pci 0000:02:00.0: enabling Extended Tags
[18749.099804] pci 0000:02:00.0: supports D1 D2
[18749.099806] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.100401] pci 0000:03:00.0: [8086:15d3] type 01 class 0x060400
[18749.100484] pci 0000:03:00.0: enabling Extended Tags
[18749.100671] pci 0000:03:00.0: supports D1 D2
[18749.100674] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.100879] pci 0000:03:01.0: [8086:15d3] type 01 class 0x060400
[18749.100942] pci 0000:03:01.0: enabling Extended Tags
[18749.101066] pci 0000:03:01.0: supports D1 D2
[18749.101068] pci 0000:03:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.101258] pci 0000:03:02.0: [8086:15d3] type 01 class 0x060400
[18749.101333] pci 0000:03:02.0: enabling Extended Tags
[18749.101471] pci 0000:03:02.0: supports D1 D2
[18749.101474] pci 0000:03:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.101794] pci 0000:03:04.0: [8086:15d3] type 01 class 0x060400
[18749.101869] pci 0000:03:04.0: enabling Extended Tags
[18749.102089] pci 0000:03:04.0: supports D1 D2
[18749.102093] pci 0000:03:04.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.102375] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[18749.102395] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[18749.102402] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[18749.102490] pci 0000:03:00.0: PCI bridge to [bus 04]
[18749.102504] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[18749.102583] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[18749.102596] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[18749.102604] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[18749.102748] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
[18749.102776] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
[18749.102861] pci 0000:38:00.0: enabling Extended Tags
[18749.103107] pci 0000:38:00.0: supports D1 D2
[18749.103111] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[18749.103215] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31.504
Gb/s with 8.0 GT/s PCIe x4 link)
[18749.103431] pci 0000:03:02.0: PCI bridge to [bus 38]
[18749.103443] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[18749.103535] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[18749.103548] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[18749.103555] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[18749.103596] pci_bus 0000:03: Allocating resources
[18749.103624] pci 0000:03:01.0: bridge window [io  0x1000-0x0fff] to
[bus 05-37] add_size 1000
[18749.103629] pci 0000:03:02.0: bridge window [io  0x1000-0x0fff] to
[bus 38] add_size 1000
[18749.103631] pci 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[18749.103635] pci 0000:03:04.0: bridge window [io  0x1000-0x0fff] to
[bus 39-6c] add_size 1000
[18749.103638] pci 0000:02:00.0: bridge window [io  0x1000-0x0fff] to
[bus 03-6c] add_size 4000
[18749.103645] pci 0000:02:00.0: BAR 13: assigned [io  0x2000-0x5fff]
[18749.103652] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[18749.103654] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[18749.103657] pci 0000:03:01.0: BAR 13: assigned [io  0x2000-0x2fff]
[18749.103659] pci 0000:03:02.0: BAR 13: assigned [io  0x3000-0x3fff]
[18749.103661] pci 0000:03:04.0: BAR 13: assigned [io  0x4000-0x4fff]
[18749.103665] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[18749.103667] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[18749.103669] pci 0000:03:00.0: PCI bridge to [bus 04]
[18749.103678] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[18749.103690] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[18749.103693] pci 0000:03:01.0:   bridge window [io  0x2000-0x2fff]
[18749.103699] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[18749.103704] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[18749.103712] pci 0000:03:02.0: PCI bridge to [bus 38]
[18749.103716] pci 0000:03:02.0:   bridge window [io  0x3000-0x3fff]
[18749.103722] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[18749.103733] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[18749.103735] pci 0000:03:04.0:   bridge window [io  0x4000-0x4fff]
[18749.103740] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[18749.103744] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[18749.103752] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[18749.103756] pci 0000:02:00.0:   bridge window [io  0x2000-0x5fff]
[18749.103762] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[18749.103767] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[18749.103853] pcieport 0000:02:00.0: enabling device (0006 -> 0007)
[18749.112985] pcieport 0000:03:01.0: enabling device (0006 -> 0007)
[18749.113561] pcieport 0000:03:02.0: enabling device (0006 -> 0007)
[18749.114275] pcieport 0000:03:04.0: enabling device (0006 -> 0007)
[18749.116042] xhci_hcd 0000:38:00.0: xHCI Host Controller
[18749.116048] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 3
[18749.117311] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
version 0x110 quirks 0x0000000200009810
[18749.117782] usb usb3: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.11
[18749.117785] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[18749.117787] usb usb3: Product: xHCI Host Controller
[18749.117789] usb usb3: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[18749.117791] usb usb3: SerialNumber: 0000:38:00.0
[18749.117985] hub 3-0:1.0: USB hub found
[18749.117995] hub 3-0:1.0: 2 ports detected
[18749.118900] xhci_hcd 0000:38:00.0: xHCI Host Controller
[18749.118904] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 4
[18749.118908] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[18749.118961] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 5.11
[18749.118964] usb usb4: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[18749.118965] usb usb4: Product: xHCI Host Controller
[18749.118967] usb usb4: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[18749.118968] usb usb4: SerialNumber: 0000:38:00.0
[18749.119164] hub 4-0:1.0: USB hub found
[18749.119177] hub 4-0:1.0: 2 ports detected
[18749.463260] usb 4-2: new SuperSpeedPlus Gen 2 USB device number 2
using xhci_hcd
[18749.486323] usb 4-2: New USB device found, idVendor=2900,
idProduct=8383, bcdDevice= 1.0a
[18749.486344] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[18749.486354] usb 4-2: Product: 4-Port USB 3.0 Hub
[18749.486361] usb 4-2: Manufacturer: Generic
[18749.490230] hub 4-2:1.0: USB hub found
[18749.490676] hub 4-2:1.0: 4 ports detected
[18749.791233] usb 4-2.1: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
[18749.818255] usb 4-2.1: New USB device found, idVendor=05e3,
idProduct=0626, bcdDevice= 6.55
[18749.818268] usb 4-2.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[18749.818275] usb 4-2.1: Product: USB3.1 Hub
[18749.818279] usb 4-2.1: Manufacturer: GenesysLogic
[18749.820840] hub 4-2.1:1.0: USB hub found
[18749.821202] hub 4-2.1:1.0: 4 ports detected
[18750.111133] usb 4-2.1.3: new SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[18750.135823] usb 4-2.1.3: New USB device found, idVendor=0bda,
idProduct=8153, bcdDevice=30.00
[18750.135840] usb 4-2.1.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=6
[18750.135842] usb 4-2.1.3: Product: USB 10/100/1000 LAN
[18750.135843] usb 4-2.1.3: Manufacturer: Realtek
[18750.135844] usb 4-2.1.3: SerialNumber: 000001
[18750.219205] usb 4-2.1.4: new SuperSpeed Gen 1 USB device number 5
using xhci_hcd
[18750.240829] usb 4-2.1.4: New USB device found, idVendor=058f,
idProduct=8468, bcdDevice= 1.00
[18750.240838] usb 4-2.1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[18750.240839] usb 4-2.1.4: Product: Mass Storage Device
[18750.240840] usb 4-2.1.4: Manufacturer: Generic
[18750.240841] usb 4-2.1.4: SerialNumber: 058F84688461
[18750.319697] usb 4-2.1.3: reset SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[18750.344307] r8152 4-2.1.3:1.0: Direct firmware load for
rtl_nic/rtl8153a-4.fw failed with error -2
[18750.344330] r8152 4-2.1.3:1.0: unable to load firmware patch
rtl_nic/rtl8153a-4.fw (-2)
[18750.365494] usb-storage 4-2.1.4:1.0: USB Mass Storage device detected
[18750.366060] scsi host4: usb-storage 4-2.1.4:1.0
[18750.366502] usbcore: registered new interface driver usb-storage
[18750.374087] usbcore: registered new interface driver uas
[18750.387495] r8152 4-2.1.3:1.0 eth0: v1.11.11
[18750.463135] r8152 4-2.1.3:1.0 enx00e04cb5877c: renamed from eth0
[18751.368123] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
  1.00 PQ: 0 ANSI: 6
[18751.368733] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
  1.08 PQ: 0 ANSI: 6
[18751.369524] sd 4:0:0:0: Attached scsi generic sg0 type 0
[18751.370071] sd 4:0:0:1: Attached scsi generic sg1 type 0
[18751.388549] sd 4:0:0:0: [sda] Attached SCSI removable disk
[18751.388976] sd 4:0:0:1: [sdb] Attached SCSI removable disk
[18753.631878] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04cb5877c: link
becomes ready
[18753.632485] r8152 4-2.1.3:1.0 enx00e04cb5877c: carrier on

(at hub disconnection)
[18848.819858] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
[18848.999416] [drm] UVD and UVD ENC initialized successfully.
[18849.100370] [drm] VCE initialized successfully.
[18946.839352] usb 1-3: USB disconnect, device number 8
[18946.839373] usb 1-3.1: USB disconnect, device number 9
[18946.840644] usb 1-3.5: USB disconnect, device number 10
[18946.890865] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
[18946.916623] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
intr, status -71
[18947.068201] usb usb3-port2: over-current condition
[18947.604290] usb 4-2: USB disconnect, device number 2
[18947.604307] usb 4-2.1: USB disconnect, device number 3
[18947.604315] usb 4-2.1.3: USB disconnect, device number 4
[18947.604721] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
[18947.604748] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
[18947.604756] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
[18947.604763] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
[18947.685529] usb 4-2.1.4: USB disconnect, device number 5
[18948.304163] usb usb4-port2: over-current condition

>
> hub reports overcurrent condition, worth keeping in mind.
>
This condition can actually persist through reboot. Which causes the
kworker to spawn immediately after boot.

>
> Is this xHC contoller in a Alpine Ridge/Titan Ridge/Maple Ridge based system
> that has runtime PM enabled by default, and whole xHC controller
> disappears from PCI bus when last device is disconnected?
> (check with lspci -nn)
>
It is an Alpine Ridge controller. Here is the `lspci -nn` output

00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen
Core Processor Host Bridge/DRAM Registers [8086:5910] (rev 05)
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500
v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 05)
00:02.0 VGA compatible controller [0300]: Intel Corporation Device
[8086:591b] (rev 04)
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon
E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
[8086:1903] (rev 05)
00:13.0 Non-VGA unclassified device [0000]: Intel Corporation 100
Series/C230 Series Chipset Family Integrated Sensor Hub [8086:a135]
(rev 31)
00:14.0 USB controller [0c03]: Intel Corporation 100 Series/C230
Series Chipset Family USB 3.0 xHCI Controller [8086:a12f] (rev 31)
00:14.2 Signal processing controller [1180]: Intel Corporation 100
Series/C230 Series Chipset Family Thermal Subsystem [8086:a131] (rev
31)
00:15.0 Signal processing controller [1180]: Intel Corporation 100
Series/C230 Series Chipset Family Serial IO I2C Controller #0
[8086:a160] (rev 31)
00:16.0 Communication controller [0780]: Intel Corporation 100
Series/C230 Series Chipset Family MEI Controller #1 [8086:a13a] (rev
31)
00:17.0 SATA controller [0106]: Intel Corporation HM170/QM170 Chipset
SATA Controller [AHCI Mode] [8086:a103] (rev 31)
00:1c.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
Chipset Family PCI Express Root Port #1 [8086:a110] (rev f1)
00:1c.4 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
Chipset Family PCI Express Root Port #5 [8086:a114] (rev f1)
00:1c.5 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
Chipset Family PCI Express Root Port #6 [8086:a115] (rev f1)
00:1d.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
Chipset Family PCI Express Root Port #9 [8086:a118] (rev f1)
00:1e.0 Signal processing controller [1180]: Intel Corporation 100
Series/C230 Series Chipset Family Serial IO UART #0 [8086:a127] (rev
31)
00:1e.2 Signal processing controller [1180]: Intel Corporation 100
Series/C230 Series Chipset Family Serial IO GSPI #0 [8086:a129] (rev
31)
00:1f.0 ISA bridge [0601]: Intel Corporation HM175 Chipset LPC/eSPI
Controller [8086:a152] (rev 31)
00:1f.2 Memory controller [0580]: Intel Corporation 100 Series/C230
Series Chipset Family Power Management Controller [8086:a121] (rev 31)
00:1f.3 Audio device [0403]: Intel Corporation CM238 HD Audio
Controller [8086:a171] (rev 31)
00:1f.4 SMBus [0c05]: Intel Corporation 100 Series/C230 Series Chipset
Family SMBus [8086:a123] (rev 31)
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc.
[AMD/ATI] Polaris 22 [Radeon RX Vega M GL] [1002:694e] (rev c0)
02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)
6d:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd.
RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
6e:00.0 Network controller [0280]: Intel Corporation Wireless 8265 /
8275 [8086:24fd] (rev 78)
6f:00.0 Non-Volatile memory controller [0108]: Sandisk Corp Device [15b7:5002]

One thing I notice is that when the hub is disconnected, the USB
controller is still there.
It will remain there until I plug and unplug another device. After
that, the following section will be gone.

02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)

> Does it help if another USB device is connected to a different
> roothub port of this xHC while disconnecting the hub?
> Or does just disabling runtime PM for this xhci help?
>
I tried with another usb device on the root hub port. But it does not help.
I am not sure about how to disable runtime PM. I tried to use `echo on
> .../0000:38:00.0/power/control` (its value was auto). But it also
does not help.

Thanks
Yiyu Zhu

Re: kworker takes 100% core after unplugging usb c hub

[Mathias Nyman]

Hi Yiyu Zhu

On 17.2.2021 10.50, Yiyu Zhu wrote:
> Hi Mathias,
> 
> Hi
> 
>>
>> Could you add usbcore dynamic debug, it should show more details about hub activity.
>>
>> mount -t debugfs none /sys/kernel/debug
>> echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control
>>
> Here are the dmesg after I enabled dynamic debug.
> 

...

> (at hub disconnection)
> [18848.819858] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
> [18848.999416] [drm] UVD and UVD ENC initialized successfully.
> [18849.100370] [drm] VCE initialized successfully.
> [18946.839352] usb 1-3: USB disconnect, device number 8
> [18946.839373] usb 1-3.1: USB disconnect, device number 9
> [18946.840644] usb 1-3.5: USB disconnect, device number 10
> [18946.890865] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
> [18946.916623] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
> intr, status -71
> [18947.068201] usb usb3-port2: over-current condition
> [18947.604290] usb 4-2: USB disconnect, device number 2
> [18947.604307] usb 4-2.1: USB disconnect, device number 3
> [18947.604315] usb 4-2.1.3: USB disconnect, device number 4
> [18947.604721] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> [18947.604748] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> [18947.604756] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> [18947.604763] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> [18947.685529] usb 4-2.1.4: USB disconnect, device number 5
> [18948.304163] usb usb4-port2: over-current condition
> 

Hmm, I think something went wrong when enabling usbcore dynamic degug.
I was expecting more hub messages.
Is CONFIG_DYNAMIC_DEBUG set?
Is this a snippet from console or dmesg? maybe some issues with log level
(/proc/sys/kernel/printk)?

The other cpu hogging worker was related to pm, maybe adding initcall_debug
boot option to the kernel cmdline could reveal something. 

>>
>> hub reports overcurrent condition, worth keeping in mind.
>>
> This condition can actually persist through reboot. Which causes the
> kworker to spawn immediately after boot.
> 
>>
>> Is this xHC contoller in a Alpine Ridge/Titan Ridge/Maple Ridge based system
>> that has runtime PM enabled by default, and whole xHC controller
>> disappears from PCI bus when last device is disconnected?
>> (check with lspci -nn)
>>
> It is an Alpine Ridge controller. Here is the `lspci -nn` output
> 
> 00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen
> Core Processor Host Bridge/DRAM Registers [8086:5910] (rev 05)
> 00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500
> v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 05)
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Device
> [8086:591b] (rev 04)
> 00:04.0 Signal processing controller [1180]: Intel Corporation Xeon
> E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
> [8086:1903] (rev 05)
> 00:13.0 Non-VGA unclassified device [0000]: Intel Corporation 100
> Series/C230 Series Chipset Family Integrated Sensor Hub [8086:a135]
> (rev 31)
> 00:14.0 USB controller [0c03]: Intel Corporation 100 Series/C230
> Series Chipset Family USB 3.0 xHCI Controller [8086:a12f] (rev 31)
> 00:14.2 Signal processing controller [1180]: Intel Corporation 100
> Series/C230 Series Chipset Family Thermal Subsystem [8086:a131] (rev
> 31)
> 00:15.0 Signal processing controller [1180]: Intel Corporation 100
> Series/C230 Series Chipset Family Serial IO I2C Controller #0
> [8086:a160] (rev 31)
> 00:16.0 Communication controller [0780]: Intel Corporation 100
> Series/C230 Series Chipset Family MEI Controller #1 [8086:a13a] (rev
> 31)
> 00:17.0 SATA controller [0106]: Intel Corporation HM170/QM170 Chipset
> SATA Controller [AHCI Mode] [8086:a103] (rev 31)
> 00:1c.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> Chipset Family PCI Express Root Port #1 [8086:a110] (rev f1)
> 00:1c.4 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> Chipset Family PCI Express Root Port #5 [8086:a114] (rev f1)
> 00:1c.5 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> Chipset Family PCI Express Root Port #6 [8086:a115] (rev f1)
> 00:1d.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> Chipset Family PCI Express Root Port #9 [8086:a118] (rev f1)
> 00:1e.0 Signal processing controller [1180]: Intel Corporation 100
> Series/C230 Series Chipset Family Serial IO UART #0 [8086:a127] (rev
> 31)
> 00:1e.2 Signal processing controller [1180]: Intel Corporation 100
> Series/C230 Series Chipset Family Serial IO GSPI #0 [8086:a129] (rev
> 31)
> 00:1f.0 ISA bridge [0601]: Intel Corporation HM175 Chipset LPC/eSPI
> Controller [8086:a152] (rev 31)
> 00:1f.2 Memory controller [0580]: Intel Corporation 100 Series/C230
> Series Chipset Family Power Management Controller [8086:a121] (rev 31)
> 00:1f.3 Audio device [0403]: Intel Corporation CM238 HD Audio
> Controller [8086:a171] (rev 31)
> 00:1f.4 SMBus [0c05]: Intel Corporation 100 Series/C230 Series Chipset
> Family SMBus [8086:a123] (rev 31)
> 01:00.0 Display controller [0380]: Advanced Micro Devices, Inc.
> [AMD/ATI] Polaris 22 [Radeon RX Vega M GL] [1002:694e] (rev c0)
> 02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
> USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)
> 6d:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd.
> RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
> 6e:00.0 Network controller [0280]: Intel Corporation Wireless 8265 /
> 8275 [8086:24fd] (rev 78)
> 6f:00.0 Non-Volatile memory controller [0108]: Sandisk Corp Device [15b7:5002]
> 
> One thing I notice is that when the hub is disconnected, the USB
> controller is still there.
> It will remain there until I plug and unplug another device. After
> that, the following section will be gone.
> 
> 02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> 38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
> USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)
> 
>> Does it help if another USB device is connected to a different
>> roothub port of this xHC while disconnecting the hub?
>> Or does just disabling runtime PM for this xhci help?
>>
> I tried with another usb device on the root hub port. But it does not help.
> I am not sure about how to disable runtime PM. I tried to use `echo on
>> .../0000:38:00.0/power/control` (its value was auto). But it also
> does not help.
> 
> Thanks
> Yiyu Zhu
> 

Ok, thanks for the info
-Mathias

Re: kworker takes 100% core after unplugging usb c hub

[Yiyu Zhu]

Hi Mathias,

I did not set the correct printk value. Here is a recent dmesg showing
the hub connection and disconnection on Linux 5.11.0.

[ 1638.295144] usb usb1: usb wakeup-resume
[ 1638.295161] usb usb1: usb auto-resume
[ 1638.295200] hub 1-0:1.0: hub_resume
[ 1638.295244] usb usb1-port2: status 0101 change 0001
[ 1638.295297] usb usb1-port5: status 0507 change 0000
[ 1638.295325] usb usb1-port7: status 0107 change 0000
[ 1638.402985] hub 1-0:1.0: state 7 ports 16 chg 0004 evt 0000
[ 1638.403009] usb usb1-port2: status 0101, change 0000, 12 Mb/s
[ 1638.530971] usb 1-2: new high-speed USB device number 7 using xhci_hcd
[ 1638.681711] usb 1-2: default language 0x0409
[ 1638.682344] usb 1-2: udev 7, busnum 1, minor = 6
[ 1638.682358] usb 1-2: New USB device found, idVendor=291a,
idProduct=5423, bcdDevice= 1.0a
[ 1638.682367] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1638.682374] usb 1-2: Product: 4-Port USB 2.0 Hub
[ 1638.682379] usb 1-2: Manufacturer: Generic
[ 1638.682686] usb 1-2: usb_probe_device
[ 1638.682694] usb 1-2: configuration #1 chosen from 1 choice
[ 1638.683873] usb 1-2: adding 1-2:1.0 (config #1, interface 0)
[ 1638.683949] hub 1-2:1.0: usb_probe_interface
[ 1638.683957] hub 1-2:1.0: usb_probe_interface - got id
[ 1638.683964] hub 1-2:1.0: USB hub found
[ 1638.684215] hub 1-2:1.0: 5 ports detected
[ 1638.684230] hub 1-2:1.0: compound device; port removable status: FRRRR
[ 1638.684236] hub 1-2:1.0: individual port power switching
[ 1638.684241] hub 1-2:1.0: individual port over-current protection
[ 1638.685148] hub 1-2:1.0: TT per port
[ 1638.685157] hub 1-2:1.0: TT requires at most 16 FS bit times (1332 ns)
[ 1638.685163] hub 1-2:1.0: Port indicators are supported
[ 1638.685167] hub 1-2:1.0: power on to power good time: 0ms
[ 1638.685363] hub 1-2:1.0: local power source is good
[ 1638.685837] hub 1-2:1.0: enabling power on all ports
[ 1638.786900] usb 1-2-port1: status 0101 change 0001
[ 1638.894955] hub 1-2:1.0: state 7 ports 5 chg 0002 evt 0000
[ 1638.895268] usb 1-2-port1: status 0101, change 0000, 12 Mb/s
[ 1638.895492] usb 1-2-port1: indicator auto status 0
[ 1638.974872] usb 1-2.1: new high-speed USB device number 8 using xhci_hcd
[ 1639.076826] usb 1-2.1: default language 0x0409
[ 1639.077467] usb 1-2.1: udev 8, busnum 1, minor = 7
[ 1639.077484] usb 1-2.1: New USB device found, idVendor=05e3,
idProduct=0610, bcdDevice= 6.55
[ 1639.077499] usb 1-2.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1639.077509] usb 1-2.1: Product: USB2.1 Hub
[ 1639.077518] usb 1-2.1: Manufacturer: GenesysLogic
[ 1639.077798] usb 1-2.1: usb_probe_device
[ 1639.077809] usb 1-2.1: configuration #1 chosen from 1 choice
[ 1639.081691] usb 1-2.1: adding 1-2.1:1.0 (config #1, interface 0)
[ 1639.081812] hub 1-2.1:1.0: usb_probe_interface
[ 1639.081824] hub 1-2.1:1.0: usb_probe_interface - got id
[ 1639.081837] hub 1-2.1:1.0: USB hub found
[ 1639.082177] hub 1-2.1:1.0: 4 ports detected
[ 1639.082190] hub 1-2.1:1.0: standalone hub
[ 1639.082198] hub 1-2.1:1.0: ganged power switching
[ 1639.082207] hub 1-2.1:1.0: global over-current protection
[ 1639.082215] hub 1-2.1:1.0: Single TT
[ 1639.082223] hub 1-2.1:1.0: TT requires at most 32 FS bit times (2664 ns)
[ 1639.082234] hub 1-2.1:1.0: Port indicators are supported
[ 1639.082242] hub 1-2.1:1.0: power on to power good time: 100ms
[ 1639.082656] hub 1-2.1:1.0: local power source is good
[ 1639.082666] hub 1-2.1:1.0: no over-current condition exists
[ 1639.083345] hub 1-2.1:1.0: enabling power on all ports
[ 1639.187891] hub 1-2.1:1.0: state 7 ports 4 chg 0000 evt 0000
[ 1639.188992] hub 1-2.1:1.0: hub_suspend
[ 1639.199568] usb 1-2.1: usb auto-suspend, wakeup 1
[ 1639.218757] hub 1-2:1.0: hub_suspend
[ 1639.337447] hub 1-0:1.0: state 7 ports 16 chg 0000 evt 0004
[ 1639.337468] usb 1-2: usb auto-suspend, wakeup 1
[ 1639.466710] usb 1-2: usb wakeup-resume
[ 1639.466758] usb 1-2: Waited 0ms for CONNECT
[ 1639.466764] usb 1-2: finish resume
[ 1639.467088] hub 1-2:1.0: hub_resume
[ 1639.467136] usb 1-2-port1: status 0507 change 0000
[ 1639.467424] usb 1-2-port5: status 0101 change 0001
[ 1639.475222] pci 0000:02:00.0: [8086:15d3] type 01 class 0x060400
[ 1639.475319] pci 0000:02:00.0: enabling Extended Tags
[ 1639.475498] pci 0000:02:00.0: supports D1 D2
[ 1639.475502] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.476061] pci 0000:03:00.0: [8086:15d3] type 01 class 0x060400
[ 1639.476157] pci 0000:03:00.0: enabling Extended Tags
[ 1639.476334] pci 0000:03:00.0: supports D1 D2
[ 1639.476337] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.476587] pci 0000:03:01.0: [8086:15d3] type 01 class 0x060400
[ 1639.476678] pci 0000:03:01.0: enabling Extended Tags
[ 1639.476854] pci 0000:03:01.0: supports D1 D2
[ 1639.476857] pci 0000:03:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.477108] pci 0000:03:02.0: [8086:15d3] type 01 class 0x060400
[ 1639.477203] pci 0000:03:02.0: enabling Extended Tags
[ 1639.477385] pci 0000:03:02.0: supports D1 D2
[ 1639.477390] pci 0000:03:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.477744] pci 0000:03:04.0: [8086:15d3] type 01 class 0x060400
[ 1639.477842] pci 0000:03:04.0: enabling Extended Tags
[ 1639.478028] pci 0000:03:04.0: supports D1 D2
[ 1639.478033] pci 0000:03:04.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.478369] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[ 1639.478401] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[ 1639.478416] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[ 1639.478565] pci 0000:03:00.0: PCI bridge to [bus 04]
[ 1639.478587] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[ 1639.478823] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[ 1639.478844] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[ 1639.478859] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[ 1639.479072] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
[ 1639.479111] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
[ 1639.479222] pci 0000:38:00.0: enabling Extended Tags
[ 1639.479454] pci 0000:38:00.0: supports D1 D2
[ 1639.479461] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1639.479582] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31.504
Gb/s with 8.0 GT/s PCIe x4 link)
[ 1639.479942] pci 0000:03:02.0: PCI bridge to [bus 38]
[ 1639.479964] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[ 1639.480087] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[ 1639.480107] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[ 1639.480122] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[ 1639.480180] pci_bus 0000:03: Allocating resources
[ 1639.480218] pci 0000:03:01.0: bridge window [io  0x1000-0x0fff] to
[bus 05-37] add_size 1000
[ 1639.480228] pci 0000:03:02.0: bridge window [io  0x1000-0x0fff] to
[bus 38] add_size 1000
[ 1639.480237] pci 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[ 1639.480248] pci 0000:03:04.0: bridge window [io  0x1000-0x0fff] to
[bus 39-6c] add_size 1000
[ 1639.480258] pci 0000:02:00.0: bridge window [io  0x1000-0x0fff] to
[bus 03-6c] add_size 4000
[ 1639.480272] pci 0000:02:00.0: BAR 13: assigned [io  0x2000-0x5fff]
[ 1639.480289] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1639.480296] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[ 1639.480304] pci 0000:03:01.0: BAR 13: assigned [io  0x2000-0x2fff]
[ 1639.480310] pci 0000:03:02.0: BAR 13: assigned [io  0x3000-0x3fff]
[ 1639.480317] pci 0000:03:04.0: BAR 13: assigned [io  0x4000-0x4fff]
[ 1639.480330] pci 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1639.480336] pci 0000:03:02.0: BAR 15: failed to assign [mem size
0x00200000 64bit pref]
[ 1639.480344] pci 0000:03:00.0: PCI bridge to [bus 04]
[ 1639.480358] pci 0000:03:00.0:   bridge window [mem 0xde000000-0xde0fffff]
[ 1639.480378] pci 0000:03:01.0: PCI bridge to [bus 05-37]
[ 1639.480386] pci 0000:03:01.0:   bridge window [io  0x2000-0x2fff]
[ 1639.480398] pci 0000:03:01.0:   bridge window [mem 0xb0000000-0xc7efffff]
[ 1639.480409] pci 0000:03:01.0:   bridge window [mem
0x2f90000000-0x2fafffffff 64bit pref]
[ 1639.480424] pci 0000:03:02.0: PCI bridge to [bus 38]
[ 1639.480431] pci 0000:03:02.0:   bridge window [io  0x3000-0x3fff]
[ 1639.480443] pci 0000:03:02.0:   bridge window [mem 0xc7f00000-0xc7ffffff]
[ 1639.480462] pci 0000:03:04.0: PCI bridge to [bus 39-6c]
[ 1639.480469] pci 0000:03:04.0:   bridge window [io  0x4000-0x4fff]
[ 1639.480481] pci 0000:03:04.0:   bridge window [mem 0xc8000000-0xddffffff]
[ 1639.480491] pci 0000:03:04.0:   bridge window [mem
0x2fb0000000-0x2fd9ffffff 64bit pref]
[ 1639.480506] pci 0000:02:00.0: PCI bridge to [bus 03-6c]
[ 1639.480514] pci 0000:02:00.0:   bridge window [io  0x2000-0x5fff]
[ 1639.480526] pci 0000:02:00.0:   bridge window [mem 0xb0000000-0xde0fffff]
[ 1639.480540] pci 0000:02:00.0:   bridge window [mem
0x2f90000000-0x2fd9ffffff 64bit pref]
[ 1639.480632] pcieport 0000:02:00.0: enabling device (0006 -> 0007)
[ 1639.482300] pcieport 0000:03:01.0: enabling device (0006 -> 0007)
[ 1639.483230] pcieport 0000:03:02.0: enabling device (0006 -> 0007)
[ 1639.483823] pcieport 0000:03:04.0: enabling device (0006 -> 0007)
[ 1639.485044] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 1639.485063] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 3
[ 1639.486225] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
version 0x110 quirks 0x0000000200009810
[ 1639.486243] xhci_hcd 0000:38:00.0: supports USB remote wakeup
[ 1639.486551] usb usb3: default language 0x0409
[ 1639.486575] usb usb3: udev 1, busnum 3, minor = 256
[ 1639.486580] usb usb3: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.11
[ 1639.486586] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1639.486623] usb usb3: Product: xHCI Host Controller
[ 1639.486629] usb usb3: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[ 1639.486634] usb usb3: SerialNumber: 0000:38:00.0
[ 1639.487174] usb usb3: usb_probe_device
[ 1639.487186] usb usb3: configuration #1 chosen from 1 choice
[ 1639.487229] usb usb3: adding 3-0:1.0 (config #1, interface 0)
[ 1639.487298] hub 3-0:1.0: usb_probe_interface
[ 1639.487305] hub 3-0:1.0: usb_probe_interface - got id
[ 1639.487312] hub 3-0:1.0: USB hub found
[ 1639.487334] hub 3-0:1.0: 2 ports detected
[ 1639.487338] hub 3-0:1.0: standalone hub
[ 1639.487341] hub 3-0:1.0: no power switching (usb 1.0)
[ 1639.487344] hub 3-0:1.0: individual port over-current protection
[ 1639.487348] hub 3-0:1.0: Single TT
[ 1639.487350] hub 3-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1639.487354] hub 3-0:1.0: power on to power good time: 20ms
[ 1639.487373] hub 3-0:1.0: local power source is good
[ 1639.488620] hub 3-0:1.0: trying to enable port power on non-switchable hub
[ 1639.488949] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 1639.488966] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 4
[ 1639.488978] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 1639.488986] xhci_hcd 0000:38:00.0: supports USB remote wakeup
[ 1639.489058] usb usb4: skipped 1 descriptor after endpoint
[ 1639.489075] usb usb4: default language 0x0409
[ 1639.489109] usb usb4: udev 1, busnum 4, minor = 384
[ 1639.489119] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 5.11
[ 1639.489128] usb usb4: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1639.489134] usb usb4: Product: xHCI Host Controller
[ 1639.489140] usb usb4: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[ 1639.489146] usb usb4: SerialNumber: 0000:38:00.0
[ 1639.489435] usb usb4: usb_probe_device
[ 1639.489449] usb usb4: configuration #1 chosen from 1 choice
[ 1639.489495] usb usb4: adding 4-0:1.0 (config #1, interface 0)
[ 1639.489601] hub 4-0:1.0: usb_probe_interface
[ 1639.489609] hub 4-0:1.0: usb_probe_interface - got id
[ 1639.489625] hub 4-0:1.0: USB hub found
[ 1639.489702] hub 4-0:1.0: 2 ports detected
[ 1639.489711] hub 4-0:1.0: standalone hub
[ 1639.489716] hub 4-0:1.0: no power switching (usb 1.0)
[ 1639.489721] hub 4-0:1.0: individual port over-current protection
[ 1639.489725] hub 4-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1639.489732] hub 4-0:1.0: power on to power good time: 20ms
[ 1639.489759] hub 4-0:1.0: local power source is good
[ 1639.491665] hub 4-0:1.0: trying to enable port power on non-switchable hub
[ 1639.574674] usb usb1-port2: resume, status 0
[ 1639.574696] hub 1-2:1.0: state 7 ports 5 chg 0020 evt 0000
[ 1639.574741] usb 1-2-port5: status 0101, change 0000, 12 Mb/s
[ 1639.574956] usb 1-2-port5: indicator auto status 0
[ 1639.590694] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
[ 1639.590709] hub 3-0:1.0: hub_suspend
[ 1639.590719] usb usb3: bus auto-suspend, wakeup 1
[ 1639.654609] usb 1-2.5: new high-speed USB device number 9 using xhci_hcd
[ 1639.698666] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000
[ 1639.698736] hub 4-0:1.0: hub_suspend
[ 1639.698754] usb usb4: bus auto-suspend, wakeup 1
[ 1639.698766] usb usb4: bus suspend fail, err -16
[ 1639.698772] hub 4-0:1.0: hub_resume
[ 1639.698788] usb usb4-port1: status 0203 change 0011
[ 1639.756646] usb 1-2.5: default language 0x0409
[ 1639.757169] usb 1-2.5: udev 9, busnum 1, minor = 8
[ 1639.757184] usb 1-2.5: New USB device found, idVendor=0bda,
idProduct=5450, bcdDevice= 1.01
[ 1639.757194] usb 1-2.5: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1639.757201] usb 1-2.5: Product: BillBoard Device
[ 1639.757206] usb 1-2.5: Manufacturer: Realtek
[ 1639.757503] usb 1-2.5: usb_probe_device
[ 1639.757519] usb 1-2.5: configuration #1 chosen from 1 choice
[ 1639.758004] usb 1-2.5: adding 1-2.5:1.0 (config #1, interface 0)
[ 1639.810625] hub 4-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1639.811053] usb usb4-port1: status 0203, change 0000, 10.0 Gb/s
[ 1639.939008] usb 4-1: new SuperSpeedPlus Gen 2 USB device number 2
using xhci_hcd
[ 1639.965109] usb 4-1: skipped 1 descriptor after endpoint
[ 1639.965329] usb 4-1: default language 0x0409
[ 1639.965945] usb 4-1: udev 2, busnum 4, minor = 385
[ 1639.965956] usb 4-1: New USB device found, idVendor=2900,
idProduct=8383, bcdDevice= 1.0a
[ 1639.965966] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1639.965973] usb 4-1: Product: 4-Port USB 3.0 Hub
[ 1639.965979] usb 4-1: Manufacturer: Generic
[ 1639.966257] usb 4-1: usb_probe_device
[ 1639.966264] usb 4-1: configuration #1 chosen from 1 choice
[ 1639.967895] usb 4-1: adding 4-1:1.0 (config #1, interface 0)
[ 1639.968370] hub 4-1:1.0: usb_probe_interface
[ 1639.968383] hub 4-1:1.0: usb_probe_interface - got id
[ 1639.968396] hub 4-1:1.0: USB hub found
[ 1639.968659] hub 4-1:1.0: 4 ports detected
[ 1639.968669] hub 4-1:1.0: standalone hub
[ 1639.968674] hub 4-1:1.0: individual port power switching
[ 1639.968679] hub 4-1:1.0: individual port over-current protection
[ 1639.968683] hub 4-1:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1639.968689] hub 4-1:1.0: power on to power good time: 0ms
[ 1639.969006] hub 4-1:1.0: local power source is good
[ 1639.969499] hub 4-1:1.0: enabling power on all ports
[ 1640.074857] usb 4-1-port1: status 0203 change 0010
[ 1640.178564] hub 4-1:1.0: state 7 ports 4 chg 0002 evt 0000
[ 1640.178836] usb 4-1-port1: status 0203, change 0000, 10.0 Gb/s
[ 1640.258712] usb 4-1.1: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
[ 1640.285169] usb 4-1.1: skipped 1 descriptor after endpoint
[ 1640.285460] usb 4-1.1: default language 0x0409
[ 1640.286221] usb 4-1.1: udev 3, busnum 4, minor = 386
[ 1640.286236] usb 4-1.1: New USB device found, idVendor=05e3,
idProduct=0626, bcdDevice= 6.55
[ 1640.286245] usb 4-1.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1640.286252] usb 4-1.1: Product: USB3.1 Hub
[ 1640.286257] usb 4-1.1: Manufacturer: GenesysLogic
[ 1640.286934] usb 4-1.1: usb_probe_device
[ 1640.286946] usb 4-1.1: configuration #1 chosen from 1 choice
[ 1640.289733] usb 4-1.1: adding 4-1.1:1.0 (config #1, interface 0)
[ 1640.290325] hub 4-1.1:1.0: usb_probe_interface
[ 1640.290334] hub 4-1.1:1.0: usb_probe_interface - got id
[ 1640.290342] hub 4-1.1:1.0: USB hub found
[ 1640.293808] hub 4-1.1:1.0: 4 ports detected
[ 1640.293815] hub 4-1.1:1.0: standalone hub
[ 1640.293818] hub 4-1.1:1.0: ganged power switching
[ 1640.293820] hub 4-1.1:1.0: global over-current protection
[ 1640.293823] hub 4-1.1:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1640.293826] hub 4-1.1:1.0: power on to power good time: 100ms
[ 1640.294360] hub 4-1.1:1.0: local power source is good
[ 1640.294365] hub 4-1.1:1.0: no over-current condition exists
[ 1640.295181] hub 4-1.1:1.0: enabling power on all ports
[ 1640.296295] hub 4-1:1.0: state 7 ports 4 chg 0000 evt 0002
[ 1640.399649] usb 4-1.1-port3: status 0203 change 0011
[ 1640.400645] usb 4-1.1-port4: status 0203 change 0011
[ 1640.502609] hub 4-1.1:1.0: state 7 ports 4 chg 0018 evt 0000
[ 1640.502977] usb 4-1.1-port3: status 0203, change 0000, 5.0 Gb/s
[ 1640.582678] usb 4-1.1.3: new SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[ 1640.602938] usb 4-1.1.3: USB quirks for this device: 400
[ 1640.603795] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.603805] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.603810] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.604112] usb 4-1.1.3: skipped 3 descriptors after interface
[ 1640.604117] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.604121] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.604125] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1640.604318] usb 4-1.1.3: default language 0x0409
[ 1640.604926] usb 4-1.1.3: udev 4, busnum 4, minor = 387
[ 1640.604937] usb 4-1.1.3: New USB device found, idVendor=0bda,
idProduct=8153, bcdDevice=30.00
[ 1640.604943] usb 4-1.1.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=6
[ 1640.604948] usb 4-1.1.3: Product: USB 10/100/1000 LAN
[ 1640.604952] usb 4-1.1.3: Manufacturer: Realtek
[ 1640.604955] usb 4-1.1.3: SerialNumber: 000001
[ 1640.605239] usb 4-1.1.3: usb_probe_device
[ 1640.605248] usb 4-1.1.3: configuration #2 chosen from 2 choices
[ 1640.606530] usb 4-1.1.3: adding 4-1.1.3:2.0 (config #2, interface 0)
[ 1640.606722] r8152 4-1.1.3:2.0: usb_probe_interface
[ 1640.606736] r8152 4-1.1.3:2.0: usb_probe_interface - got id
[ 1640.606826] cdc_ether 4-1.1.3:2.0: usb_probe_interface
[ 1640.606838] cdc_ether 4-1.1.3:2.0: usb_probe_interface - got id
[ 1640.606856] r8153_ecm 4-1.1.3:2.0: usb_probe_interface
[ 1640.606863] r8153_ecm 4-1.1.3:2.0: usb_probe_interface - got id
[ 1640.606983] usb 4-1.1.3: adding 4-1.1.3:2.1 (config #2, interface 1)
[ 1640.607195] usb 4-1.1.3: unregistering interface 4-1.1.3:2.0
[ 1640.607285] usb 4-1.1.3: unregistering interface 4-1.1.3:2.1
[ 1640.607361] usb 4-1.1-port4: status 0203, change 0000, 5.0 Gb/s
[ 1640.607410] usb 4-1.1.3: usb_disable_device nuking non-ep0 URBs
[ 1640.610317] usb 4-1.1.3: adding 4-1.1.3:1.0 (config #1, interface 0)
[ 1640.610419] r8152 4-1.1.3:1.0: usb_probe_interface
[ 1640.610434] r8152 4-1.1.3:1.0: usb_probe_interface - got id
[ 1640.690509] usb 4-1.1.4: new SuperSpeed Gen 1 USB device number 5
using xhci_hcd
[ 1640.712240] usb 4-1.1.4: skipped 1 descriptor after endpoint
[ 1640.712252] usb 4-1.1.4: skipped 1 descriptor after endpoint
[ 1640.712461] usb 4-1.1.4: default language 0x0409
[ 1640.713257] usb 4-1.1.4: udev 5, busnum 4, minor = 388
[ 1640.713268] usb 4-1.1.4: New USB device found, idVendor=058f,
idProduct=8468, bcdDevice= 1.00
[ 1640.713275] usb 4-1.1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 1640.713279] usb 4-1.1.4: Product: Mass Storage Device
[ 1640.713283] usb 4-1.1.4: Manufacturer: Generic
[ 1640.713286] usb 4-1.1.4: SerialNumber: 058F84688461
[ 1640.713560] usb 4-1.1.4: usb_probe_device
[ 1640.713571] usb 4-1.1.4: configuration #1 chosen from 1 choice
[ 1640.715840] usb 4-1.1.4: adding 4-1.1.4:1.0 (config #1, interface 0)
[ 1640.716065] hub 4-1.1:1.0: state 7 ports 4 chg 0000 evt 0010
[ 1640.726054] hub 4-1.1:1.0: state 7 ports 4 chg 0000 evt 0008
[ 1640.778891] hp_wmi: Unknown event_id - 131073 - 0x0
[ 1640.796512] hub 1-0:1.0: state 7 ports 16 chg 0000 evt 0004
[ 1640.796548] usb usb1-port2: status 0100, change 0001, 12 Mb/s
[ 1640.796555] usb 1-2: USB disconnect, device number 7
[ 1640.796558] usb 1-2.1: USB disconnect, device number 8
[ 1640.796560] usb 1-2.1: unregistering device
[ 1640.796563] usb 1-2.1: unregistering interface 1-2.1:1.0
[ 1640.796697] usb 1-2.1: usb_disable_device nuking all URBs
[ 1640.797416] usb 1-2.5: USB disconnect, device number 9
[ 1640.797434] usb 1-2.5: unregistering device
[ 1640.797437] usb 1-2.5: unregistering interface 1-2.5:1.0
[ 1640.797469] usb 1-2.5: usb_disable_device nuking all URBs
[ 1640.797613] usb 1-2: unregistering device
[ 1640.797616] usb 1-2: unregistering interface 1-2:1.0
[ 1640.797669] xhci_hcd 0000:00:14.0: shutdown urb ffff9be3848e8d80 ep1in-intr
[ 1640.797773] usb 1-2: usb_disable_device nuking all URBs
[ 1640.946495] usb usb1-port2: debounce total 100ms stable 100ms status 0x100
[ 1640.946528] hub 1-0:1.0: hub_suspend
[ 1640.946548] usb usb1: bus auto-suspend, wakeup 1
[ 1641.768923] usb usb1: usb wakeup-resume
[ 1641.768940] usb usb1: usb auto-resume
[ 1641.768979] hub 1-0:1.0: hub_resume
[ 1641.769024] usb usb1-port2: status 0101 change 0001
[ 1641.769078] usb usb1-port5: status 0507 change 0000
[ 1641.769106] usb usb1-port7: status 0107 change 0000
[ 1641.874201] hub 1-0:1.0: state 7 ports 16 chg 0004 evt 0000
[ 1641.874248] usb usb1-port2: status 0101, change 0000, 12 Mb/s
[ 1642.002280] usb 1-2: new high-speed USB device number 10 using xhci_hcd
[ 1642.154168] usb 1-2: default language 0x0409
[ 1642.155079] usb 1-2: udev 10, busnum 1, minor = 9
[ 1642.155098] usb 1-2: New USB device found, idVendor=291a,
idProduct=5423, bcdDevice= 1.0a
[ 1642.155107] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1642.155114] usb 1-2: Product: 4-Port USB 2.0 Hub
[ 1642.155119] usb 1-2: Manufacturer: Generic
[ 1642.155452] usb 1-2: usb_probe_device
[ 1642.155464] usb 1-2: configuration #1 chosen from 1 choice
[ 1642.156570] usb 1-2: adding 1-2:1.0 (config #1, interface 0)
[ 1642.156650] hub 1-2:1.0: usb_probe_interface
[ 1642.156657] hub 1-2:1.0: usb_probe_interface - got id
[ 1642.156666] hub 1-2:1.0: USB hub found
[ 1642.156918] hub 1-2:1.0: 5 ports detected
[ 1642.156934] hub 1-2:1.0: compound device; port removable status: FRRRR
[ 1642.156940] hub 1-2:1.0: individual port power switching
[ 1642.156945] hub 1-2:1.0: individual port over-current protection
[ 1642.158251] hub 1-2:1.0: TT per port
[ 1642.158266] hub 1-2:1.0: TT requires at most 16 FS bit times (1332 ns)
[ 1642.158277] hub 1-2:1.0: Port indicators are supported
[ 1642.158285] hub 1-2:1.0: power on to power good time: 0ms
[ 1642.158571] hub 1-2:1.0: local power source is good
[ 1642.159083] hub 1-2:1.0: enabling power on all ports
[ 1642.262275] usb 1-2-port1: status 0101 change 0001
[ 1642.366197] hub 1-2:1.0: state 7 ports 5 chg 0002 evt 0000
[ 1642.366359] usb 1-2-port1: status 0101, change 0000, 12 Mb/s
[ 1642.366709] usb 1-2-port1: indicator auto status 0
[ 1642.446187] usb 1-2.1: new high-speed USB device number 11 using xhci_hcd
[ 1642.553074] usb 1-2.1: default language 0x0409
[ 1642.553778] usb 1-2.1: udev 11, busnum 1, minor = 10
[ 1642.553793] usb 1-2.1: New USB device found, idVendor=05e3,
idProduct=0610, bcdDevice= 6.55
[ 1642.553803] usb 1-2.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1642.553809] usb 1-2.1: Product: USB2.1 Hub
[ 1642.553814] usb 1-2.1: Manufacturer: GenesysLogic
[ 1642.554132] usb 1-2.1: usb_probe_device
[ 1642.554145] usb 1-2.1: configuration #1 chosen from 1 choice
[ 1642.555463] usb 1-2.1: adding 1-2.1:1.0 (config #1, interface 0)
[ 1642.555606] hub 1-2.1:1.0: usb_probe_interface
[ 1642.555619] hub 1-2.1:1.0: usb_probe_interface - got id
[ 1642.555630] hub 1-2.1:1.0: USB hub found
[ 1642.555958] hub 1-2.1:1.0: 4 ports detected
[ 1642.555971] hub 1-2.1:1.0: standalone hub
[ 1642.555979] hub 1-2.1:1.0: ganged power switching
[ 1642.555988] hub 1-2.1:1.0: global over-current protection
[ 1642.555996] hub 1-2.1:1.0: Single TT
[ 1642.556003] hub 1-2.1:1.0: TT requires at most 32 FS bit times (2664 ns)
[ 1642.556013] hub 1-2.1:1.0: Port indicators are supported
[ 1642.556022] hub 1-2.1:1.0: power on to power good time: 100ms
[ 1642.556486] hub 1-2.1:1.0: local power source is good
[ 1642.556497] hub 1-2.1:1.0: no over-current condition exists
[ 1642.557138] hub 1-2.1:1.0: enabling power on all ports
[ 1642.663668] hub 1-2.1:1.0: state 7 ports 4 chg 0000 evt 0000
[ 1642.664996] hub 1-2.1:1.0: hub_suspend
[ 1642.675515] usb 1-2.1: usb auto-suspend, wakeup 1
[ 1642.694000] hub 1-2:1.0: hub_suspend
[ 1642.714067] usb 1-2: usb auto-suspend, wakeup 1
[ 1642.746050] hub 1-0:1.0: state 7 ports 16 chg 0000 evt 0004
[ 1642.770047] usb 1-2: usb wakeup-resume
[ 1642.770115] usb 1-2: Waited 0ms for CONNECT
[ 1642.770122] usb 1-2: finish resume
[ 1642.770502] hub 1-2:1.0: hub_resume
[ 1642.770608] usb 1-2-port1: status 0507 change 0000
[ 1642.770992] usb 1-2-port5: status 0101 change 0001
[ 1642.878002] usb usb1-port2: resume, status 0
[ 1642.878023] hub 1-2:1.0: state 7 ports 5 chg 0020 evt 0000
[ 1642.878178] usb 1-2-port5: status 0101, change 0000, 12 Mb/s
[ 1642.878461] usb 1-2-port5: indicator auto status 0
[ 1642.958063] usb 1-2.5: new high-speed USB device number 12 using xhci_hcd
[ 1643.060993] usb 1-2.5: default language 0x0409
[ 1643.061615] usb 1-2.5: udev 12, busnum 1, minor = 11
[ 1643.061630] usb 1-2.5: New USB device found, idVendor=0bda,
idProduct=5450, bcdDevice= 1.01
[ 1643.061640] usb 1-2.5: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1643.061647] usb 1-2.5: Product: BillBoard Device
[ 1643.061653] usb 1-2.5: Manufacturer: Realtek
[ 1643.061991] usb 1-2.5: usb_probe_device
[ 1643.062002] usb 1-2.5: configuration #1 chosen from 1 choice
[ 1643.066558] usb 1-2.5: adding 1-2.5:1.0 (config #1, interface 0)
[ 1644.493871] xhci_hcd 0000:38:00.0: remove, state 1
[ 1644.493876] xhci_hcd 0000:38:00.0: roothub graceful disconnect
[ 1644.493881] usb usb4: USB disconnect, device number 1
[ 1644.493883] usb 4-1: USB disconnect, device number 2
[ 1644.493884] usb 4-1.1: USB disconnect, device number 3
[ 1644.962015] hp_wmi: Unknown event_id - 131073 - 0x0
[ 1645.939854] xhci_hcd 0000:38:00.0: xHCI host controller not
responding, assume dead
[ 1645.939895] xhci_hcd 0000:38:00.0: Timeout waiting for reset device command
[ 1646.345303] usb 4-1.1.3: device not accepting address 4, error -22
[ 1646.345334] usb 4-1.1-port3: logical disconnect
[ 1646.345370] r8152 4-1.1.3:1.0 (unnamed net_device) (uninitialized):
Get ether addr fail
[ 1646.345428] hub 4-1.1:1.0: state 0 ports 4 chg 0008 evt 0000
[ 1646.345446] usb 4-1.1.3: USB disconnect, device number 4
[ 1646.346134] r8152 4-1.1.3:1.0 eth0: v1.11.11
[ 1646.346407] usb 4-1.1.3: unregistering device
[ 1646.346419] usb 4-1.1.3: unregistering interface 4-1.1.3:1.0
[ 1646.393904] usb 4-1.1.3: usb_disable_device nuking all URBs
[ 1646.394591] usb 4-1.1.4: USB disconnect, device number 5
[ 1646.394603] usb 4-1.1.4: unregistering device
[ 1646.394609] usb 4-1.1.4: unregistering interface 4-1.1.4:1.0
[ 1646.394739] usb 4-1.1.4: usb_disable_device nuking all URBs
[ 1646.395279] usb 4-1.1: unregistering device
[ 1646.395294] usb 4-1.1: unregistering interface 4-1.1:1.0
[ 1646.395745] usb 4-1.1: usb_disable_device nuking all URBs
[ 1646.396205] usb 4-1: unregistering device
[ 1646.396219] usb 4-1: unregistering interface 4-1:1.0
[ 1646.396636] usb 4-1: usb_disable_device nuking all URBs
[ 1646.397091] usb usb4: unregistering device
[ 1646.397103] usb usb4: unregistering interface 4-0:1.0
[ 1646.397249] xhci_hcd 0000:38:00.0: shutdown urb ffff9be365d83d80 ep1in-intr
[ 1646.397542] usb usb4: usb_disable_device nuking all URBs
[ 1646.397973] xhci_hcd 0000:38:00.0: USB bus 4 deregistered
[ 1646.398000] xhci_hcd 0000:38:00.0: remove, state 4
[ 1646.398009] xhci_hcd 0000:38:00.0: roothub graceful disconnect
[ 1646.398019] usb usb3: USB disconnect, device number 1
[ 1646.398028] usb usb3: unregistering device
[ 1646.398035] usb usb3: unregistering interface 3-0:1.0
[ 1646.398355] usb usb3: usb_disable_device nuking all URBs
[ 1646.398710] xhci_hcd 0000:38:00.0: Host halt failed, -19
[ 1646.398724] xhci_hcd 0000:38:00.0: Host not accessible, reset failed.
[ 1646.398994] xhci_hcd 0000:38:00.0: USB bus 3 deregistered
[ 1646.421648] pci_bus 0000:03: Allocating resources
[ 1646.421698] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[ 1646.421736] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1646.421749] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1646.421768] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1646.421777] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1646.436195] usbcore: registered new interface driver usb-storage
[ 1646.438626] usbcore: registered new interface driver uas
[ 1649.641049] pci 0000:38:00.0: [8086:15d4] type 00 class 0x0c0330
[ 1649.641074] pci 0000:38:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff]
[ 1649.641148] pci 0000:38:00.0: enabling Extended Tags
[ 1649.641294] pci 0000:38:00.0: supports D1 D2
[ 1649.641296] pci 0000:38:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 1649.641415] pci 0000:38:00.0: 8.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x4 link at 0000:03:02.0 (capable of 31.504
Gb/s with 8.0 GT/s PCIe x4 link)
[ 1649.641544] pcieport 0000:03:02.0: ASPM: current common clock
configuration is inconsistent, reconfiguring
[ 1649.641616] pci_bus 0000:03: Allocating resources
[ 1649.641635] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[ 1649.641641] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1649.641643] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1649.641645] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1649.641646] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1649.641910] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 1649.641916] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 3
[ 1649.643071] xhci_hcd 0000:38:00.0: hcc params 0x200077c1 hci
version 0x110 quirks 0x0000000200009810
[ 1649.643078] xhci_hcd 0000:38:00.0: supports USB remote wakeup
[ 1649.643351] usb usb3: default language 0x0409
[ 1649.643361] usb usb3: udev 1, busnum 3, minor = 256
[ 1649.643363] usb usb3: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.11
[ 1649.643365] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1649.643366] usb usb3: Product: xHCI Host Controller
[ 1649.643368] usb usb3: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[ 1649.643369] usb usb3: SerialNumber: 0000:38:00.0
[ 1649.643544] usb usb3: usb_probe_device
[ 1649.643548] usb usb3: configuration #1 chosen from 1 choice
[ 1649.643557] usb usb3: adding 3-0:1.0 (config #1, interface 0)
[ 1649.643575] hub 3-0:1.0: usb_probe_interface
[ 1649.643576] hub 3-0:1.0: usb_probe_interface - got id
[ 1649.643578] hub 3-0:1.0: USB hub found
[ 1649.643587] hub 3-0:1.0: 2 ports detected
[ 1649.643588] hub 3-0:1.0: standalone hub
[ 1649.643589] hub 3-0:1.0: no power switching (usb 1.0)
[ 1649.643590] hub 3-0:1.0: individual port over-current protection
[ 1649.643591] hub 3-0:1.0: Single TT
[ 1649.643592] hub 3-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1649.643594] hub 3-0:1.0: power on to power good time: 20ms
[ 1649.643600] hub 3-0:1.0: local power source is good
[ 1649.643994] hub 3-0:1.0: trying to enable port power on non-switchable hub
[ 1649.644172] xhci_hcd 0000:38:00.0: xHCI Host Controller
[ 1649.644175] xhci_hcd 0000:38:00.0: new USB bus registered, assigned
bus number 4
[ 1649.644177] xhci_hcd 0000:38:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 1649.644179] xhci_hcd 0000:38:00.0: supports USB remote wakeup
[ 1649.644202] usb usb4: skipped 1 descriptor after endpoint
[ 1649.644205] usb usb4: default language 0x0409
[ 1649.644213] usb usb4: udev 1, busnum 4, minor = 384
[ 1649.644215] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 5.11
[ 1649.644217] usb usb4: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1649.644218] usb usb4: Product: xHCI Host Controller
[ 1649.644219] usb usb4: Manufacturer: Linux 5.11.0-051100-generic xhci-hcd
[ 1649.644220] usb usb4: SerialNumber: 0000:38:00.0
[ 1649.644318] usb usb4: usb_probe_device
[ 1649.644319] usb usb4: configuration #1 chosen from 1 choice
[ 1649.644327] usb usb4: adding 4-0:1.0 (config #1, interface 0)
[ 1649.644344] hub 4-0:1.0: usb_probe_interface
[ 1649.644345] hub 4-0:1.0: usb_probe_interface - got id
[ 1649.644347] hub 4-0:1.0: USB hub found
[ 1649.644354] hub 4-0:1.0: 2 ports detected
[ 1649.644356] hub 4-0:1.0: standalone hub
[ 1649.644357] hub 4-0:1.0: no power switching (usb 1.0)
[ 1649.644358] hub 4-0:1.0: individual port over-current protection
[ 1649.644358] hub 4-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1649.644360] hub 4-0:1.0: power on to power good time: 20ms
[ 1649.644365] hub 4-0:1.0: local power source is good
[ 1649.644781] hub 4-0:1.0: trying to enable port power on non-switchable hub
[ 1649.746606] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
[ 1649.746629] hub 3-0:1.0: hub_suspend
[ 1649.746647] usb usb3: bus auto-suspend, wakeup 1
[ 1649.856703] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000
[ 1649.856773] hub 4-0:1.0: hub_suspend
[ 1649.856792] usb usb4: bus auto-suspend, wakeup 1
[ 1649.856803] usb usb4: bus suspend fail, err -16
[ 1649.856809] hub 4-0:1.0: hub_resume
[ 1649.856825] usb usb4-port1: status 0203 change 0011
[ 1649.962673] hub 4-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1649.962722] usb usb4-port1: status 0203, change 0000, 10.0 Gb/s
[ 1650.089187] usb 4-1: new SuperSpeedPlus Gen 2 USB device number 2
using xhci_hcd
[ 1650.114569] usb 4-1: skipped 1 descriptor after endpoint
[ 1650.114812] usb 4-1: default language 0x0409
[ 1650.115538] usb 4-1: udev 2, busnum 4, minor = 385
[ 1650.115541] usb 4-1: New USB device found, idVendor=2900,
idProduct=8383, bcdDevice= 1.0a
[ 1650.115544] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1650.115545] usb 4-1: Product: 4-Port USB 3.0 Hub
[ 1650.115547] usb 4-1: Manufacturer: Generic
[ 1650.115671] usb 4-1: usb_probe_device
[ 1650.115674] usb 4-1: configuration #1 chosen from 1 choice
[ 1650.117676] usb 4-1: adding 4-1:1.0 (config #1, interface 0)
[ 1650.118074] hub 4-1:1.0: usb_probe_interface
[ 1650.118077] hub 4-1:1.0: usb_probe_interface - got id
[ 1650.118079] hub 4-1:1.0: USB hub found
[ 1650.118363] hub 4-1:1.0: 4 ports detected
[ 1650.118366] hub 4-1:1.0: standalone hub
[ 1650.118367] hub 4-1:1.0: individual port power switching
[ 1650.118369] hub 4-1:1.0: individual port over-current protection
[ 1650.118370] hub 4-1:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1650.118371] hub 4-1:1.0: power on to power good time: 0ms
[ 1650.118726] hub 4-1:1.0: local power source is good
[ 1650.119146] hub 4-1:1.0: enabling power on all ports
[ 1650.218352] usb 4-1-port1: status 0203 change 0010
[ 1650.320829] hub 4-1:1.0: state 7 ports 4 chg 0002 evt 0000
[ 1650.321083] usb 4-1-port1: status 0203, change 0000, 10.0 Gb/s
[ 1650.399044] usb 4-1.1: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
[ 1650.420852] usb 4-1.1: skipped 1 descriptor after endpoint
[ 1650.421057] usb 4-1.1: default language 0x0409
[ 1650.421640] usb 4-1.1: udev 3, busnum 4, minor = 386
[ 1650.421653] usb 4-1.1: New USB device found, idVendor=05e3,
idProduct=0626, bcdDevice= 6.55
[ 1650.421663] usb 4-1.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1650.421669] usb 4-1.1: Product: USB3.1 Hub
[ 1650.421675] usb 4-1.1: Manufacturer: GenesysLogic
[ 1650.421967] usb 4-1.1: usb_probe_device
[ 1650.421976] usb 4-1.1: configuration #1 chosen from 1 choice
[ 1650.428742] usb 4-1.1: adding 4-1.1:1.0 (config #1, interface 0)
[ 1650.429155] hub 4-1.1:1.0: usb_probe_interface
[ 1650.429164] hub 4-1.1:1.0: usb_probe_interface - got id
[ 1650.429173] hub 4-1.1:1.0: USB hub found
[ 1650.429472] hub 4-1.1:1.0: 4 ports detected
[ 1650.429480] hub 4-1.1:1.0: standalone hub
[ 1650.429485] hub 4-1.1:1.0: ganged power switching
[ 1650.429490] hub 4-1.1:1.0: global over-current protection
[ 1650.429495] hub 4-1.1:1.0: TT requires at most 8 FS bit times (666 ns)
[ 1650.429502] hub 4-1.1:1.0: power on to power good time: 100ms
[ 1650.429783] hub 4-1.1:1.0: local power source is good
[ 1650.429790] hub 4-1.1:1.0: no over-current condition exists
[ 1650.430382] hub 4-1.1:1.0: enabling power on all ports
[ 1650.431183] hub 4-1:1.0: state 7 ports 4 chg 0000 evt 0002
[ 1650.533758] usb 4-1.1-port3: status 0203 change 0010
[ 1650.534442] usb 4-1.1-port4: status 0203 change 0010
[ 1650.635120] hub 4-1.1:1.0: state 7 ports 4 chg 0018 evt 0000
[ 1650.635494] usb 4-1.1-port3: status 0203, change 0000, 5.0 Gb/s
[ 1650.713912] usb 4-1.1.3: new SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[ 1650.733977] usb 4-1.1.3: USB quirks for this device: 400
[ 1650.734836] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.734850] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.734857] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.735108] usb 4-1.1.3: skipped 3 descriptors after interface
[ 1650.735114] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.735120] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.735125] usb 4-1.1.3: skipped 1 descriptor after endpoint
[ 1650.735248] usb 4-1.1.3: default language 0x0409
[ 1650.735589] usb 4-1.1.3: udev 4, busnum 4, minor = 387
[ 1650.735597] usb 4-1.1.3: New USB device found, idVendor=0bda,
idProduct=8153, bcdDevice=30.00
[ 1650.735606] usb 4-1.1.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=6
[ 1650.735612] usb 4-1.1.3: Product: USB 10/100/1000 LAN
[ 1650.735617] usb 4-1.1.3: Manufacturer: Realtek
[ 1650.735622] usb 4-1.1.3: SerialNumber: 000001
[ 1650.735933] usb 4-1.1.3: usb_probe_device
[ 1650.735950] usb 4-1.1.3: configuration #2 chosen from 2 choices
[ 1650.737361] usb 4-1.1.3: adding 4-1.1.3:2.0 (config #2, interface 0)
[ 1650.737620] r8152 4-1.1.3:2.0: usb_probe_interface
[ 1650.737637] r8152 4-1.1.3:2.0: usb_probe_interface - got id
[ 1650.737744] cdc_ether 4-1.1.3:2.0: usb_probe_interface
[ 1650.737755] cdc_ether 4-1.1.3:2.0: usb_probe_interface - got id
[ 1650.737780] r8153_ecm 4-1.1.3:2.0: usb_probe_interface
[ 1650.737789] r8153_ecm 4-1.1.3:2.0: usb_probe_interface - got id
[ 1650.737991] usb 4-1.1.3: adding 4-1.1.3:2.1 (config #2, interface 1)
[ 1650.738319] usb 4-1.1.3: unregistering interface 4-1.1.3:2.0
[ 1650.738451] usb 4-1.1.3: unregistering interface 4-1.1.3:2.1
[ 1650.738589] usb 4-1.1-port4: status 0203, change 0000, 5.0 Gb/s
[ 1650.738666] usb 4-1.1.3: usb_disable_device nuking non-ep0 URBs
[ 1650.741361] usb 4-1.1.3: adding 4-1.1.3:1.0 (config #1, interface 0)
[ 1650.741541] r8152 4-1.1.3:1.0: usb_probe_interface
[ 1650.741565] r8152 4-1.1.3:1.0: usb_probe_interface - got id
[ 1650.816117] usb 4-1.1.4: new SuperSpeed Gen 1 USB device number 5
using xhci_hcd
[ 1650.836949] usb 4-1.1.4: skipped 1 descriptor after endpoint
[ 1650.836959] usb 4-1.1.4: skipped 1 descriptor after endpoint
[ 1650.837058] usb 4-1.1.4: default language 0x0409
[ 1650.837660] usb 4-1.1.4: udev 5, busnum 4, minor = 388
[ 1650.837665] usb 4-1.1.4: New USB device found, idVendor=058f,
idProduct=8468, bcdDevice= 1.00
[ 1650.837669] usb 4-1.1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 1650.837672] usb 4-1.1.4: Product: Mass Storage Device
[ 1650.837675] usb 4-1.1.4: Manufacturer: Generic
[ 1650.837677] usb 4-1.1.4: SerialNumber: 058F84688461
[ 1650.837905] usb 4-1.1.4: usb_probe_device
[ 1650.837913] usb 4-1.1.4: configuration #1 chosen from 1 choice
[ 1650.840156] usb 4-1.1.4: adding 4-1.1.4:1.0 (config #1, interface 0)
[ 1650.840229] usb-storage 4-1.1.4:1.0: usb_probe_interface
[ 1650.840239] usb-storage 4-1.1.4:1.0: usb_probe_interface - got id
[ 1650.840252] usb-storage 4-1.1.4:1.0: USB Mass Storage device detected
[ 1650.840589] scsi host4: usb-storage 4-1.1.4:1.0
[ 1650.840906] hub 4-1.1:1.0: state 7 ports 4 chg 0000 evt 0010
[ 1650.844166] hub 4-1.1:1.0: state 7 ports 4 chg 0000 evt 0008
[ 1650.922789] usb 4-1.1.3: reset SuperSpeed Gen 1 USB device number 4
using xhci_hcd
[ 1650.946539] usb 4-1.1.3: USB quirks for this device: 400
[ 1650.980894] r8152 4-1.1.3:1.0: load rtl8153a-4 v2 02/07/20 successfully
[ 1651.009527] r8152 4-1.1.3:1.0 eth0: v1.11.11
[ 1651.070832] r8152 4-1.1.3:1.0 enx00e04cb5877c: renamed from eth0
[ 1651.829771] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC
  1.00 PQ: 0 ANSI: 6
[ 1651.830537] scsi 4:0:0:1: Direct-Access     Generic- Micro SD/M2
  1.08 PQ: 0 ANSI: 6
[ 1651.831209] sd 4:0:0:0: Attached scsi generic sg0 type 0
[ 1651.831943] sd 4:0:0:1: Attached scsi generic sg1 type 0
[ 1651.853289] sd 4:0:0:0: [sda] Attached SCSI removable disk
[ 1651.861143] sd 4:0:0:1: [sdb] Attached SCSI removable disk
[ 1654.173190] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04cb5877c: link
becomes ready
[ 1654.173604] r8152 4-1.1.3:1.0 enx00e04cb5877c: carrier on
[ 1654.720505] snd_hda_intel 0000:00:1f.3: Unstable LPIB (363076 >=
192000); disabling LPIB delay counting
[ 1654.766006] pci_bus 0000:03: Allocating resources
[ 1654.766030] pcieport 0000:03:02.0: bridge window [mem
0x00100000-0x000fffff 64bit pref] to [bus 38] add_size 200000
add_align 100000
[ 1654.766036] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1654.766038] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1654.766041] pcieport 0000:03:02.0: BAR 15: no space for [mem size
0x00200000 64bit pref]
[ 1654.766042] pcieport 0000:03:02.0: BAR 15: failed to assign [mem
size 0x00200000 64bit pref]
[ 1662.603778] hub 1-0:1.0: state 7 ports 16 chg 0000 evt 0004
[ 1662.603840] usb usb1-port2: status 0100, change 0001, 12 Mb/s
[ 1662.603855] usb 1-2: USB disconnect, device number 10
[ 1662.603862] usb 1-2.1: USB disconnect, device number 11
[ 1662.603868] usb 1-2.1: unregistering device
[ 1662.603873] usb 1-2.1: unregistering interface 1-2.1:1.0
[ 1662.604170] usb 1-2.1: usb_disable_device nuking all URBs
[ 1662.605298] usb 1-2.5: USB disconnect, device number 12
[ 1662.605314] usb 1-2.5: unregistering device
[ 1662.605323] usb 1-2.5: unregistering interface 1-2.5:1.0
[ 1662.605421] usb 1-2.5: usb_disable_device nuking all URBs
[ 1662.605847] usb 1-2: unregistering device
[ 1662.605880] usb 1-2: unregistering interface 1-2:1.0
[ 1662.606004] xhci_hcd 0000:00:14.0: shutdown urb ffff9be3848e8d80 ep1in-intr
[ 1662.606388] usb 1-2: usb_disable_device nuking all URBs
[ 1662.611722] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0002
[ 1662.611741] usb usb4-port1: link state change
[ 1662.611749] usb usb4-port1: do warm reset
[ 1662.620564] usb usb3: usb wakeup-resume
[ 1662.620570] usb usb3: usb auto-resume
[ 1662.620585] hub 3-0:1.0: hub_resume
[ 1662.620607] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1662.620637] usb usb3-port1: over-current change #1
[ 1662.668681] usb usb4-port1: not warm reset yet, waiting 50ms
[ 1662.671688] r8152 4-1.1.3:1.0 enx00e04cb5877c: Stop submitting
intr, status -71
[ 1662.724578] hub 3-0:1.0: trying to enable port power on non-switchable hub
[ 1662.728662] usb usb4-port1: not warm reset yet, waiting 200ms
[ 1662.748411] usb usb1-port2: debounce total 100ms stable 100ms status 0x100
[ 1662.748458] hub 1-0:1.0: hub_suspend
[ 1662.748479] usb usb1: bus auto-suspend, wakeup 1
[ 1662.832221] usb usb3-port1: over-current condition
[ 1662.832237] usb usb3-port1: status 0008, change 0008, 12 Mb/s
[ 1662.832262] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
[ 1662.832277] hub 3-0:1.0: hub_suspend
[ 1662.832297] usb usb3: bus auto-suspend, wakeup 1
[ 1662.832307] usb usb3: bus suspend fail, err -16
[ 1662.832313] hub 3-0:1.0: hub_resume
[ 1662.832344] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1662.832363] usb usb3-port1: status 0008, change 0000, 12 Mb/s
[ 1662.832375] hub 3-0:1.0: hub_suspend
[ 1662.832388] usb usb3: bus auto-suspend, wakeup 1
[ 1662.832397] usb usb3: bus suspend fail, err -16
[ 1662.832402] hub 3-0:1.0: hub_resume
[ 1662.832433] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1662.832453] usb usb3-port1: status 0008, change 0000, 12 Mb/s
[ 1662.832463] hub 3-0:1.0: hub_suspend
[ 1662.832479] usb usb3: bus auto-suspend, wakeup 1
[ 1662.832487] usb usb3: bus suspend fail, err -16
[ 1662.832492] hub 3-0:1.0: hub_resume
[ 1662.832524] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1662.832542] usb usb3-port1: status 0008, change 0000, 12 Mb/s
[ 1662.832552] hub 3-0:1.0: hub_suspend
[ 1662.832564] usb usb3: bus auto-suspend, wakeup 1
[ 1662.832573] usb usb3: bus suspend fail, err -16
[ 1662.832578] hub 3-0:1.0: hub_resume
[ 1662.832611] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
[ 1662.832631] usb usb3-port1: status 0008, change 0000, 12 Mb/s

The log around hub_suspend and hub_resume repeats from this point on.
I only showed the first several repetitions.

Thanks
Yiyu Zhu

On Fri, Feb 19, 2021 at 1:43 AM Mathias Nyman
<mathias.nyman@linux.intel.com> wrote:
>
> Hi Yiyu Zhu
>
> On 17.2.2021 10.50, Yiyu Zhu wrote:
> > Hi Mathias,
> >
> > Hi
> >
> >>
> >> Could you add usbcore dynamic debug, it should show more details about hub activity.
> >>
> >> mount -t debugfs none /sys/kernel/debug
> >> echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control
> >>
> > Here are the dmesg after I enabled dynamic debug.
> >
>
> ...
>
> > (at hub disconnection)
> > [18848.819858] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
> > [18848.999416] [drm] UVD and UVD ENC initialized successfully.
> > [18849.100370] [drm] VCE initialized successfully.
> > [18946.839352] usb 1-3: USB disconnect, device number 8
> > [18946.839373] usb 1-3.1: USB disconnect, device number 9
> > [18946.840644] usb 1-3.5: USB disconnect, device number 10
> > [18946.890865] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -71
> > [18946.916623] r8152 4-2.1.3:1.0 enx00e04cb5877c: Stop submitting
> > intr, status -71
> > [18947.068201] usb usb3-port2: over-current condition
> > [18947.604290] usb 4-2: USB disconnect, device number 2
> > [18947.604307] usb 4-2.1: USB disconnect, device number 3
> > [18947.604315] usb 4-2.1.3: USB disconnect, device number 4
> > [18947.604721] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> > [18947.604748] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> > [18947.604756] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> > [18947.604763] r8152 4-2.1.3:1.0 enx00e04cb5877c: Tx status -108
> > [18947.685529] usb 4-2.1.4: USB disconnect, device number 5
> > [18948.304163] usb usb4-port2: over-current condition
> >
>
> Hmm, I think something went wrong when enabling usbcore dynamic degug.
> I was expecting more hub messages.
> Is CONFIG_DYNAMIC_DEBUG set?
> Is this a snippet from console or dmesg? maybe some issues with log level
> (/proc/sys/kernel/printk)?
>
> The other cpu hogging worker was related to pm, maybe adding initcall_debug
> boot option to the kernel cmdline could reveal something.
>
> >>
> >> hub reports overcurrent condition, worth keeping in mind.
> >>
> > This condition can actually persist through reboot. Which causes the
> > kworker to spawn immediately after boot.
> >
> >>
> >> Is this xHC contoller in a Alpine Ridge/Titan Ridge/Maple Ridge based system
> >> that has runtime PM enabled by default, and whole xHC controller
> >> disappears from PCI bus when last device is disconnected?
> >> (check with lspci -nn)
> >>
> > It is an Alpine Ridge controller. Here is the `lspci -nn` output
> >
> > 00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen
> > Core Processor Host Bridge/DRAM Registers [8086:5910] (rev 05)
> > 00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500
> > v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 05)
> > 00:02.0 VGA compatible controller [0300]: Intel Corporation Device
> > [8086:591b] (rev 04)
> > 00:04.0 Signal processing controller [1180]: Intel Corporation Xeon
> > E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
> > [8086:1903] (rev 05)
> > 00:13.0 Non-VGA unclassified device [0000]: Intel Corporation 100
> > Series/C230 Series Chipset Family Integrated Sensor Hub [8086:a135]
> > (rev 31)
> > 00:14.0 USB controller [0c03]: Intel Corporation 100 Series/C230
> > Series Chipset Family USB 3.0 xHCI Controller [8086:a12f] (rev 31)
> > 00:14.2 Signal processing controller [1180]: Intel Corporation 100
> > Series/C230 Series Chipset Family Thermal Subsystem [8086:a131] (rev
> > 31)
> > 00:15.0 Signal processing controller [1180]: Intel Corporation 100
> > Series/C230 Series Chipset Family Serial IO I2C Controller #0
> > [8086:a160] (rev 31)
> > 00:16.0 Communication controller [0780]: Intel Corporation 100
> > Series/C230 Series Chipset Family MEI Controller #1 [8086:a13a] (rev
> > 31)
> > 00:17.0 SATA controller [0106]: Intel Corporation HM170/QM170 Chipset
> > SATA Controller [AHCI Mode] [8086:a103] (rev 31)
> > 00:1c.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> > Chipset Family PCI Express Root Port #1 [8086:a110] (rev f1)
> > 00:1c.4 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> > Chipset Family PCI Express Root Port #5 [8086:a114] (rev f1)
> > 00:1c.5 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> > Chipset Family PCI Express Root Port #6 [8086:a115] (rev f1)
> > 00:1d.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series
> > Chipset Family PCI Express Root Port #9 [8086:a118] (rev f1)
> > 00:1e.0 Signal processing controller [1180]: Intel Corporation 100
> > Series/C230 Series Chipset Family Serial IO UART #0 [8086:a127] (rev
> > 31)
> > 00:1e.2 Signal processing controller [1180]: Intel Corporation 100
> > Series/C230 Series Chipset Family Serial IO GSPI #0 [8086:a129] (rev
> > 31)
> > 00:1f.0 ISA bridge [0601]: Intel Corporation HM175 Chipset LPC/eSPI
> > Controller [8086:a152] (rev 31)
> > 00:1f.2 Memory controller [0580]: Intel Corporation 100 Series/C230
> > Series Chipset Family Power Management Controller [8086:a121] (rev 31)
> > 00:1f.3 Audio device [0403]: Intel Corporation CM238 HD Audio
> > Controller [8086:a171] (rev 31)
> > 00:1f.4 SMBus [0c05]: Intel Corporation 100 Series/C230 Series Chipset
> > Family SMBus [8086:a123] (rev 31)
> > 01:00.0 Display controller [0380]: Advanced Micro Devices, Inc.
> > [AMD/ATI] Polaris 22 [Radeon RX Vega M GL] [1002:694e] (rev c0)
> > 02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
> > USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)
> > 6d:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd.
> > RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
> > 6e:00.0 Network controller [0280]: Intel Corporation Wireless 8265 /
> > 8275 [8086:24fd] (rev 78)
> > 6f:00.0 Non-Volatile memory controller [0108]: Sandisk Corp Device [15b7:5002]
> >
> > One thing I notice is that when the hub is disconnected, the USB
> > controller is still there.
> > It will remain there until I plug and unplug another device. After
> > that, the following section will be gone.
> >
> > 02:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:01.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:02.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 03:04.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3
> > Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
> > 38:00.0 USB controller [0c03]: Intel Corporation JHL6540 Thunderbolt 3
> > USB Controller (C step) [Alpine Ridge 4C 2016] [8086:15d4] (rev 02)
> >
> >> Does it help if another USB device is connected to a different
> >> roothub port of this xHC while disconnecting the hub?
> >> Or does just disabling runtime PM for this xhci help?
> >>
> > I tried with another usb device on the root hub port. But it does not help.
> > I am not sure about how to disable runtime PM. I tried to use `echo on
> >> .../0000:38:00.0/power/control` (its value was auto). But it also
> > does not help.
> >
> > Thanks
> > Yiyu Zhu
> >
>
> Ok, thanks for the info
> -Mathias

Re: kworker takes 100% core after unplugging usb c hub

[Mathias Nyman]

Hi

On 2.3.2021 8.25, Yiyu Zhu wrote:
> Hi Mathias,
> 
> I did not set the correct printk value. Here is a recent dmesg showing
> the hub connection and disconnection on Linux 5.11.0.
> 
...
> [ 1662.620564] usb usb3: usb wakeup-resume
> [ 1662.620570] usb usb3: usb auto-resume
> [ 1662.620585] hub 3-0:1.0: hub_resume
> [ 1662.620607] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> [ 1662.620637] usb usb3-port1: over-current change #1
> [ 1662.724578] hub 3-0:1.0: trying to enable port power on non-switchable hub
> [ 1662.832221] usb usb3-port1: over-current condition
> [ 1662.832237] usb usb3-port1: status 0008, change 0008, 12 Mb/s
> [ 1662.832262] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [ 1662.832277] hub 3-0:1.0: hub_suspend
> [ 1662.832297] usb usb3: bus auto-suspend, wakeup 1
> [ 1662.832307] usb usb3: bus suspend fail, err -16
> [ 1662.832313] hub 3-0:1.0: hub_resume
> [ 1662.832344] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> [ 1662.832363] usb usb3-port1: status 0008, change 0000, 12 Mb/s
> [ 1662.832375] hub 3-0:1.0: hub_suspend
> [ 1662.832388] usb usb3: bus auto-suspend, wakeup 1
> [ 1662.832397] usb usb3: bus suspend fail, err -16
> [ 1662.832402] hub 3-0:1.0: hub_resume
(removed some messages from other buses from above snippet)

Looks like the suspend/resume loop is triggered by an over-current event.
hub wq notices there is a over-current change, and an over-current status (two separate bits)
hub wq clears the change bit, tries to resolve the over-current, fails, and continues.

This hub (roothub) has no other children or activity so it runtime suspends.
After this the bus tries to suspend, but it fails as xhci bus_suspend() 
returns -EBUSY if a port is in over-current state.

Hub is woken up. hub wq runs, this time there is no over-current change
bit set as it was cleared earlier. The over-current status is still active. 
Hub wq doesn't see any activity, hub is suspended -> try to suspend bus -> fail...

Solution is still unclear, maybe hub wq should react to over-current states,
not just changes?

Thanks
Mathias

Re: kworker takes 100% core after unplugging usb c hub

[Alan Stern]

On Thu, Mar 04, 2021 at 06:31:47PM +0200, Mathias Nyman wrote:
> Hi
> 
> On 2.3.2021 8.25, Yiyu Zhu wrote:
> > Hi Mathias,
> > 
> > I did not set the correct printk value. Here is a recent dmesg showing
> > the hub connection and disconnection on Linux 5.11.0.
> > 
> ...
> > [ 1662.620564] usb usb3: usb wakeup-resume
> > [ 1662.620570] usb usb3: usb auto-resume
> > [ 1662.620585] hub 3-0:1.0: hub_resume
> > [ 1662.620607] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> > [ 1662.620637] usb usb3-port1: over-current change #1
> > [ 1662.724578] hub 3-0:1.0: trying to enable port power on non-switchable hub
> > [ 1662.832221] usb usb3-port1: over-current condition
> > [ 1662.832237] usb usb3-port1: status 0008, change 0008, 12 Mb/s
> > [ 1662.832262] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
> > [ 1662.832277] hub 3-0:1.0: hub_suspend
> > [ 1662.832297] usb usb3: bus auto-suspend, wakeup 1
> > [ 1662.832307] usb usb3: bus suspend fail, err -16
> > [ 1662.832313] hub 3-0:1.0: hub_resume
> > [ 1662.832344] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> > [ 1662.832363] usb usb3-port1: status 0008, change 0000, 12 Mb/s
> > [ 1662.832375] hub 3-0:1.0: hub_suspend
> > [ 1662.832388] usb usb3: bus auto-suspend, wakeup 1
> > [ 1662.832397] usb usb3: bus suspend fail, err -16
> > [ 1662.832402] hub 3-0:1.0: hub_resume
> (removed some messages from other buses from above snippet)
> 
> Looks like the suspend/resume loop is triggered by an over-current event.
> hub wq notices there is a over-current change, and an over-current status (two separate bits)
> hub wq clears the change bit, tries to resolve the over-current, fails, and continues.
> 
> This hub (roothub) has no other children or activity so it runtime suspends.
> After this the bus tries to suspend, but it fails as xhci bus_suspend() 
> returns -EBUSY if a port is in over-current state.
> 
> Hub is woken up. hub wq runs, this time there is no over-current change
> bit set as it was cleared earlier. The over-current status is still active. 
> Hub wq doesn't see any activity, hub is suspended -> try to suspend bus -> fail...
> 
> Solution is still unclear, maybe hub wq should react to over-current states,
> not just changes?

Your analysis seems to point to a hardware problem.  If nothing is 
plugged into the root hub, it should not report an over-current state.

Alan Stern

Re: kworker takes 100% core after unplugging usb c hub

[Mathias Nyman]

On 4.3.2021 18.33, Alan Stern wrote:
> On Thu, Mar 04, 2021 at 06:31:47PM +0200, Mathias Nyman wrote:
>> Hi
>>
>> On 2.3.2021 8.25, Yiyu Zhu wrote:
>>> Hi Mathias,
>>>
>>> I did not set the correct printk value. Here is a recent dmesg showing
>>> the hub connection and disconnection on Linux 5.11.0.
>>>
>> ...
>>> [ 1662.620564] usb usb3: usb wakeup-resume
>>> [ 1662.620570] usb usb3: usb auto-resume
>>> [ 1662.620585] hub 3-0:1.0: hub_resume
>>> [ 1662.620607] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
>>> [ 1662.620637] usb usb3-port1: over-current change #1
>>> [ 1662.724578] hub 3-0:1.0: trying to enable port power on non-switchable hub
>>> [ 1662.832221] usb usb3-port1: over-current condition
>>> [ 1662.832237] usb usb3-port1: status 0008, change 0008, 12 Mb/s
>>> [ 1662.832262] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
>>> [ 1662.832277] hub 3-0:1.0: hub_suspend
>>> [ 1662.832297] usb usb3: bus auto-suspend, wakeup 1
>>> [ 1662.832307] usb usb3: bus suspend fail, err -16
>>> [ 1662.832313] hub 3-0:1.0: hub_resume
>>> [ 1662.832344] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
>>> [ 1662.832363] usb usb3-port1: status 0008, change 0000, 12 Mb/s
>>> [ 1662.832375] hub 3-0:1.0: hub_suspend
>>> [ 1662.832388] usb usb3: bus auto-suspend, wakeup 1
>>> [ 1662.832397] usb usb3: bus suspend fail, err -16
>>> [ 1662.832402] hub 3-0:1.0: hub_resume
>> (removed some messages from other buses from above snippet)
>>
>> Looks like the suspend/resume loop is triggered by an over-current event.
>> hub wq notices there is a over-current change, and an over-current status (two separate bits)
>> hub wq clears the change bit, tries to resolve the over-current, fails, and continues.
>>
>> This hub (roothub) has no other children or activity so it runtime suspends.
>> After this the bus tries to suspend, but it fails as xhci bus_suspend() 
>> returns -EBUSY if a port is in over-current state.
>>
>> Hub is woken up. hub wq runs, this time there is no over-current change
>> bit set as it was cleared earlier. The over-current status is still active. 
>> Hub wq doesn't see any activity, hub is suspended -> try to suspend bus -> fail...
>>
>> Solution is still unclear, maybe hub wq should react to over-current states,
>> not just changes?
> 
> Your analysis seems to point to a hardware problem.  If nothing is 
> plugged into the root hub, it should not report an over-current state.
> 
> Alan Stern

Hmm, true, logs doesn't show anything connected to usb 3 (HS) bus roothub, but on
the usb4 (SS) bus roothub there is a USB 3.0 external hub connected.

[ 1650.115544] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1650.115545] usb 4-1: Product: 4-Port USB 3.0 Hub
[ 1650.115547] usb 4-1: Manufacturer: Generic

So there should be a HS hub on usb 3-1, (same connector as the SS side usb 4-1)
but instead we just see the over-current error. 

xHCI will set a HS port that has an over-current condition to a powered-off state with 
link state to Disabled, and port powered off, so no device will appear connected.

Maybe the enumerated SS HUB on usb 4-1 is draining more power from the connector than the
un-enumerated HS hub is allowed, causing the the over-current for HS the port?

-Mathias  

Re: kworker takes 100% core after unplugging usb c hub

[Alan Stern]

On Fri, Mar 05, 2021 at 11:04:52AM +0200, Mathias Nyman wrote:
> On 4.3.2021 18.33, Alan Stern wrote:
> > On Thu, Mar 04, 2021 at 06:31:47PM +0200, Mathias Nyman wrote:
> >> Hi
> >>
> >> On 2.3.2021 8.25, Yiyu Zhu wrote:
> >>> Hi Mathias,
> >>>
> >>> I did not set the correct printk value. Here is a recent dmesg showing
> >>> the hub connection and disconnection on Linux 5.11.0.
> >>>
> >> ...
> >>> [ 1662.620564] usb usb3: usb wakeup-resume
> >>> [ 1662.620570] usb usb3: usb auto-resume
> >>> [ 1662.620585] hub 3-0:1.0: hub_resume
> >>> [ 1662.620607] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> >>> [ 1662.620637] usb usb3-port1: over-current change #1
> >>> [ 1662.724578] hub 3-0:1.0: trying to enable port power on non-switchable hub
> >>> [ 1662.832221] usb usb3-port1: over-current condition
> >>> [ 1662.832237] usb usb3-port1: status 0008, change 0008, 12 Mb/s
> >>> [ 1662.832262] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
> >>> [ 1662.832277] hub 3-0:1.0: hub_suspend
> >>> [ 1662.832297] usb usb3: bus auto-suspend, wakeup 1
> >>> [ 1662.832307] usb usb3: bus suspend fail, err -16
> >>> [ 1662.832313] hub 3-0:1.0: hub_resume
> >>> [ 1662.832344] hub 3-0:1.0: state 7 ports 2 chg 0002 evt 0000
> >>> [ 1662.832363] usb usb3-port1: status 0008, change 0000, 12 Mb/s
> >>> [ 1662.832375] hub 3-0:1.0: hub_suspend
> >>> [ 1662.832388] usb usb3: bus auto-suspend, wakeup 1
> >>> [ 1662.832397] usb usb3: bus suspend fail, err -16
> >>> [ 1662.832402] hub 3-0:1.0: hub_resume
> >> (removed some messages from other buses from above snippet)
> >>
> >> Looks like the suspend/resume loop is triggered by an over-current event.
> >> hub wq notices there is a over-current change, and an over-current status (two separate bits)
> >> hub wq clears the change bit, tries to resolve the over-current, fails, and continues.
> >>
> >> This hub (roothub) has no other children or activity so it runtime suspends.
> >> After this the bus tries to suspend, but it fails as xhci bus_suspend() 
> >> returns -EBUSY if a port is in over-current state.
> >>
> >> Hub is woken up. hub wq runs, this time there is no over-current change
> >> bit set as it was cleared earlier. The over-current status is still active. 
> >> Hub wq doesn't see any activity, hub is suspended -> try to suspend bus -> fail...
> >>
> >> Solution is still unclear, maybe hub wq should react to over-current states,
> >> not just changes?
> > 
> > Your analysis seems to point to a hardware problem.  If nothing is 
> > plugged into the root hub, it should not report an over-current state.
> > 
> > Alan Stern
> 
> Hmm, true, logs doesn't show anything connected to usb 3 (HS) bus roothub, but on
> the usb4 (SS) bus roothub there is a USB 3.0 external hub connected.
> 
> [ 1650.115544] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [ 1650.115545] usb 4-1: Product: 4-Port USB 3.0 Hub
> [ 1650.115547] usb 4-1: Manufacturer: Generic
> 
> So there should be a HS hub on usb 3-1, (same connector as the SS side usb 4-1)
> but instead we just see the over-current error. 
> 
> xHCI will set a HS port that has an over-current condition to a powered-off state with 
> link state to Disabled, and port powered off, so no device will appear connected.
> 
> Maybe the enumerated SS HUB on usb 4-1 is draining more power from the connector than the
> un-enumerated HS hub is allowed, causing the the over-current for HS the port?

Or perhaps the hub communicates okay over the SS wires but causes an 
overcurrent on the USB-2 D+/D- wires.

Either way, it sounds like a hardware problem in that hub.

Alan Stern