Re: Can't unload uhci_hcd module with 2.6.22 -- also oops

"A. Kalten" <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]> 
On Wed, 1 Aug 2007 11:55:25 -0400 (EDT)
Alan Stern <[email protected]> wrote:

> 
> This shouldn't make any difference.  Your later message was
> self-contradictory; you wrote that the oops occurred only if the
> modules were loaded before the modem was plugged in, and that it also
> occurred if the modules were loaded after the modem was plugged in.
>

Sorry about the confusion.  At first I just assumed that the kernel
oops occured under all conditions, but on closer inspection I found
that it only occurs when the modules are loaded before the modem
is plugged in.

So, to get things straight:

1) plug in modem
2) load modules
3) unload modules
No kernel oops

1) load modules
2) plug in modem
3) unload modules
kernel oops


>
> Here's an additional patch for 2.6.22, to be applied along with the 
> previous patch.  Let's see what it shows.
> 

2.6.22 has been patched with this and the previous patch.

Here is the kernel log containing the oops.  It results from the
following sequence (I included the time as well):

modprobe uhci-hcd
modprobe cdc-acm
mount -t usbfs none /proc/bus/usb

Plug un external modem

umount /proc/bus/usb
rmmod cdc-acm
rmmod uhci-hcd

14:28:15 (none) kernel: usbcore: registered new interface driver usbfs
14:28:15 (none) kernel: usbcore: registered new interface driver hub
14:28:15 (none) kernel: usbcore: registered new device driver usb
14:28:15 (none) kernel: USB Universal Host Controller Interface driver v3.0
14:28:15 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 20 (level, low) -> IRQ 20
14:28:15 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.0 to 64
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.0: UHCI Host Controller
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.0: irq 20, io base 0x00006000
14:28:15 (none) kernel: usb usb1: configuration #1 chosen from 1 choice
14:28:15 (none) kernel: hub 1-0:1.0: USB hub found
14:28:15 (none) kernel: hub 1-0:1.0: 2 ports detected
14:28:15 (none) kernel: hub 1-0:1.0: Create sysfs intf files
14:28:15 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 17 (level, low) -> IRQ 17
14:28:15 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.1 to 64
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.1: UHCI Host Controller
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
14:28:15 (none) kernel: uhci_hcd 0000:00:1d.1: irq 17, io base 0x00006400
14:28:15 (none) kernel: usb usb2: configuration #1 chosen from 1 choice
14:28:15 (none) kernel: hub 2-0:1.0: USB hub found
14:28:15 (none) kernel: hub 2-0:1.0: 2 ports detected
14:28:16 (none) kernel: hub 2-0:1.0: Create sysfs intf files
14:28:16 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18
14:28:16 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.2 to 64
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.2: UHCI Host Controller
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.2: irq 18, io base 0x00006800
14:28:16 (none) kernel: usb usb3: configuration #1 chosen from 1 choice
14:28:16 (none) kernel: hub 3-0:1.0: USB hub found
14:28:16 (none) kernel: hub 3-0:1.0: 2 ports detected
14:28:16 (none) kernel: hub 3-0:1.0: Create sysfs intf files
14:28:16 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 19 (level, low) -> IRQ 19
14:28:16 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.3 to 64
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.3: UHCI Host Controller
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
14:28:16 (none) kernel: uhci_hcd 0000:00:1d.3: irq 19, io base 0x00007000
14:28:16 (none) kernel: usb usb4: configuration #1 chosen from 1 choice
14:28:16 (none) kernel: hub 4-0:1.0: USB hub found
14:28:16 (none) kernel: hub 4-0:1.0: 2 ports detected
14:28:16 (none) kernel: hub 4-0:1.0: Create sysfs intf files
14:28:16 (none) kernel: usbcore: registered new interface driver cdc_acm
14:28:16 (none) kernel: drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
14:28:36 (none) kernel: usb 2-2: new full speed USB device using uhci_hcd and address 2
14:28:36 (none) kernel: usb 2-2: configuration #2 chosen from 2 choices
14:28:37 (none) kernel: 2-2:2.0: create file ffff810079e355a0 uevent
14:28:37 (none) kernel: 2-2:2.0: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: 2-2:2.0: create file ffffffff8802a440 bmCapabilities
14:28:37 (none) kernel: cdc_acm 2-2:2.0: ttyACM0: USB ACM device
14:28:37 (none) kernel: ttyACM0: create file ffff81007983cd80 uevent
14:28:37 (none) kernel: ttyACM0: create file ffff810079c7c940 dev
14:28:37 (none) kernel: ttyACM0: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: cdc_acm 2-2:2.0: Create sysfs intf files
14:28:37 (none) kernel: 2-2:2.0: create group ffffffff8801c7b0
14:28:37 (none) kernel: Add ffffffff8801c960 bInterfaceNumber
14:28:37 (none) kernel: Add ffffffff8801c9a0 bAlternateSetting
14:28:37 (none) kernel: Add ffffffff8801c9e0 bNumEndpoints
14:28:37 (none) kernel: Add ffffffff8801ca20 bInterfaceClass
14:28:37 (none) kernel: Add ffffffff8801ca60 bInterfaceSubClass
14:28:37 (none) kernel: Add ffffffff8801caa0 bInterfaceProtocol
14:28:37 (none) kernel: Add ffffffff8801cae0 modalias
14:28:37 (none) kernel: 2-2:2.0: create file ffffffff8801c780 interface
14:28:37 (none) kernel: usbdev2.2_ep84: create file ffff81007983c190 uevent
14:28:37 (none) kernel: usbdev2.2_ep84: create file ffff810079c7c980 dev
14:28:37 (none) kernel: usbdev2.2_ep84: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: usbdev2.2_ep84: create group ffffffff8801cfe0
14:28:37 (none) kernel: Add ffffffff8801d0a0 bLength
14:28:37 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:28:37 (none) kernel: Add ffffffff8801d120 bmAttributes
14:28:37 (none) kernel: Add ffffffff8801d160 bInterval
14:28:37 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:28:37 (none) kernel: Add ffffffff8801d1e0 interval
14:28:37 (none) kernel: Add ffffffff8801d220 type
14:28:37 (none) kernel: Add ffffffff8801d260 direction
14:28:37 (none) kernel: 2-2:2.1: create file ffff810079e359a0 uevent
14:28:37 (none) kernel: 2-2:2.1: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: cdc_acm 2-2:2.1: Create sysfs intf files
14:28:37 (none) kernel: 2-2:2.1: create group ffffffff8801c7b0
14:28:37 (none) kernel: Add ffffffff8801c960 bInterfaceNumber
14:28:37 (none) kernel: Add ffffffff8801c9a0 bAlternateSetting
14:28:37 (none) kernel: Add ffffffff8801c9e0 bNumEndpoints
14:28:37 (none) kernel: Add ffffffff8801ca20 bInterfaceClass
14:28:37 (none) kernel: Add ffffffff8801ca60 bInterfaceSubClass
14:28:37 (none) kernel: Add ffffffff8801caa0 bInterfaceProtocol
14:28:37 (none) kernel: Add ffffffff8801cae0 modalias
14:28:37 (none) kernel: 2-2:2.1: create file ffffffff8801c780 interface
14:28:37 (none) kernel: usbdev2.2_ep02: create file ffff81007f7d7d90 uevent
14:28:37 (none) kernel: usbdev2.2_ep02: create file ffff810079c7c9c0 dev
14:28:37 (none) kernel: usbdev2.2_ep02: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: usbdev2.2_ep02: create group ffffffff8801cfe0
14:28:37 (none) kernel: Add ffffffff8801d0a0 bLength
14:28:37 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:28:37 (none) kernel: Add ffffffff8801d120 bmAttributes
14:28:37 (none) kernel: Add ffffffff8801d160 bInterval
14:28:37 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:28:37 (none) kernel: Add ffffffff8801d1e0 interval
14:28:37 (none) kernel: Add ffffffff8801d220 type
14:28:37 (none) kernel: Add ffffffff8801d260 direction
14:28:37 (none) kernel: usbdev2.2_ep86: create file ffff81007cfebd90 uevent
14:28:37 (none) kernel: usbdev2.2_ep86: create file ffff810079c79740 dev
14:28:37 (none) kernel: usbdev2.2_ep86: create group ffffffff80479960
14:28:37 (none) kernel: Add ffffffff80479980 wakeup
14:28:37 (none) kernel: usbdev2.2_ep86: create group ffffffff8801cfe0
14:28:37 (none) kernel: Add ffffffff8801d0a0 bLength
14:28:37 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:28:37 (none) kernel: Add ffffffff8801d120 bmAttributes
14:28:37 (none) kernel: Add ffffffff8801d160 bInterval
14:28:37 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:28:37 (none) kernel: Add ffffffff8801d1e0 interval
14:28:37 (none) kernel: Add ffffffff8801d220 type
14:28:37 (none) kernel: Add ffffffff8801d260 direction
14:29:40 (none) kernel: usbcore: deregistering interface driver cdc_acm
14:29:40 (none) kernel: cdc_acm 2-2:2.1: Remove sysfs intf files
14:29:40 (none) kernel: cdc_acm 2-2:2.1: Create sysfs intf files
14:29:40 (none) kernel: cdc_acm 2-2:2.0: Remove sysfs intf files
14:29:40 (none) kernel: cdc_acm 2-2:2.0: Create sysfs intf files
14:29:51 (none) kernel: uhci_hcd 0000:00:1d.3: remove, state 1
14:29:51 (none) kernel: usb usb4: USB disconnect, address 1
14:29:51 (none) kernel: hub 4-0:1.0: Remove sysfs intf files
14:29:51 (none) kernel: uhci_hcd 0000:00:1d.3: USB bus 4 deregistered
14:29:51 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.3 disabled
14:29:51 (none) kernel: uhci_hcd 0000:00:1d.2: remove, state 1
14:29:51 (none) kernel: usb usb3: USB disconnect, address 1
14:29:51 (none) kernel: hub 3-0:1.0: Remove sysfs intf files
14:29:51 (none) kernel: uhci_hcd 0000:00:1d.2: USB bus 3 deregistered
14:29:51 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.2 disabled
14:29:51 (none) kernel: uhci_hcd 0000:00:1d.1: remove, state 1
14:29:51 (none) kernel: usb usb2: USB disconnect, address 1
14:29:51 (none) kernel: usb 2-2: USB disconnect, address 2
14:29:51 (none) kernel: usb 2-2:2.0: Remove sysfs intf files
14:29:51 (none) kernel: usbdev2.2_ep84: remove group ffffffff8801cfe0
14:29:51 (none) kernel: Remove ffffffff8801d0a0
14:29:51 (none) kernel: Remove ffffffff8801d0e0
14:29:51 (none) kernel: Remove ffffffff8801d120
14:29:51 (none) kernel: Remove ffffffff8801d160
14:29:51 (none) kernel: Remove ffffffff8801d1a0
14:29:51 (none) kernel: Remove ffffffff8801d1e0
14:29:51 (none) kernel: Remove ffffffff8801d220
14:29:51 (none) kernel: Remove ffffffff8801d260
14:29:51 (none) kernel: usbdev2.2_ep84: remove file ffff810079c7c980
14:29:51 (none) kernel: usbdev2.2_ep84: remove file ffff81007983c190
14:29:51 (none) kernel: usbdev2.2_ep84: remove group ffffffff80479960
14:29:51 (none) kernel: Remove ffffffff80479980
14:29:51 (none) kernel: 2-2:2.0: remove file ffffffff8801c780
14:29:51 (none) kernel: 2-2:2.0: remove group ffffffff8801c7b0
14:29:51 (none) kernel: Remove ffffffff8801c960
14:29:51 (none) kernel: Remove ffffffff8801c9a0
14:29:51 (none) kernel: Remove ffffffff8801c9e0
14:29:51 (none) kernel: Remove ffffffff8801ca20
14:29:51 (none) kernel: Remove ffffffff8801ca60
14:29:51 (none) kernel: Remove ffffffff8801caa0
14:29:51 (none) kernel: Remove ffffffff8801cae0
14:29:51 (none) kernel: 2-2:2.0: remove file ffff810079e355a0
14:29:51 (none) kernel: Unable to handle kernel paging request at ffffffff8802a440 RIP: 
14:29:51 (none) kernel:  [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41
14:29:51 (none) kernel: PGD 203067 PUD 205063 PMD 7a471067 PTE 0
14:29:51 (none) kernel: Oops: 0000 [1] SMP 
14:29:51 (none) kernel: CPU 1 
14:29:51 (none) kernel: Modules linked in: uhci_hcd usbcore
14:29:51 (none) kernel: Pid: 716, comm: rmmod Not tainted 2.6.22 #5
14:29:51 (none) kernel: RIP: 0010:[sysfs_get_name+46/65]  [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41
14:29:51 (none) kernel: RSP: 0000:ffff810079af9ce0  EFLAGS: 00010246
14:29:51 (none) kernel: RAX: ffffffff8802a440 RBX: ffff810079ad8780 RCX: 0000000000007fff
14:29:51 (none) kernel: RDX: 0000000000000004 RSI: ffffffff80423b38 RDI: ffff810079ad84a8
14:29:51 (none) kernel: RBP: ffff810079ad84a8 R08: 0000000000000004 R09: 00000000ffffffff
14:29:51 (none) kernel: R10: 0000000000000000 R11: 0000000000000010 R12: ffff810079ad84b0
14:29:51 (none) kernel: R13: ffff81007f742700 R14: ffffffff80423b38 R15: ffffffff88025940
14:29:51 (none) kernel: FS:  00002ad646f8a6f0(0000) GS:ffff810002f4d140(0000) knlGS:0000000000000000
14:29:51 (none) kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
14:29:51 (none) kernel: CR2: ffffffff8802a440 CR3: 000000007f577000 CR4: 00000000000006e0
14:29:51 (none) kernel: Process rmmod (pid: 716, threadinfo ffff810079af8000, task ffff81007f58e8a0)
14:29:51 (none) kernel: Stack:  ffffffff8029b6dd ffff810079e35420 ffff810079e355a0 ffff81007cfb3000
14:29:51 (none) kernel:  ffff810079e35510 ffff81007cfb3088 ffffffff80330a87 ffff810079e35400
14:29:51 (none) kernel:  ffff810079e35400 ffff810079e35420 ffffffff80330c96 ffff810079e35400
14:29:51 (none) kernel: Call Trace:
14:29:51 (none) kernel:  [sysfs_hash_and_remove+104/295] sysfs_hash_and_remove+0x68/0x127
14:29:51 (none) kernel:  [device_remove_file+37/58] device_remove_file+0x25/0x3a
14:29:51 (none) kernel:  [device_del+375/704] device_del+0x177/0x2c0
14:29:51 (none) kernel:  [_end+128974522/2131730856] :usbcore:usb_disable_device+0x97/0x11c
14:29:51 (none) kernel:  [_end+128958961/2131730856] :usbcore:usb_disconnect+0x98/0xee
14:29:51 (none) kernel:  [_end+128958941/2131730856] :usbcore:usb_disconnect+0x84/0xee
14:29:51 (none) kernel:  [_end+128966909/2131730856] :usbcore:usb_remove_hcd+0x85/0xe1
14:29:51 (none) kernel:  [_end+129007874/2131730856] :usbcore:usb_hcd_pci_remove+0x1d/0x89
14:29:51 (none) kernel:  [pci_device_remove+36/77] pci_device_remove+0x24/0x4d
14:29:51 (none) kernel:  [__device_release_driver+130/184] __device_release_driver+0x82/0xb8
14:29:51 (none) kernel:  [driver_detach+252/261] driver_detach+0xfc/0x105
14:29:51 (none) kernel:  [bus_remove_driver+122/157] bus_remove_driver+0x7a/0x9d
14:29:51 (none) kernel:  [pci_unregister_driver+16/129] pci_unregister_driver+0x10/0x81
14:29:51 (none) kernel:  [_end+129096572/2131730856] :uhci_hcd:uhci_hcd_cleanup+0x10/0x2c
14:29:51 (none) kernel:  [sys_delete_module+319/444] sys_delete_module+0x13f/0x1bc
14:29:51 (none) kernel:  [__up_write+29/318] __up_write+0x1d/0x13e
14:29:51 (none) kernel:  [system_call+126/131] system_call+0x7e/0x83
14:29:51 (none) kernel: 
14:29:51 (none) kernel: 
14:29:51 (none) kernel: Code: 48 8b 00 c3 83 fa 20 74 f7 31 c0 0f 1f 00 c3 0f 0b eb fe 41 
14:29:51 (none) kernel: RIP  [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41
14:29:51 (none) kernel:  RSP <ffff810079af9ce0>
14:29:51 (none) kernel: CR2: ffffffff8802a440


Now here is the kernel log with no oops.  It results from
the following sequence:

Plug un external modem

modprobe uhci-hcd
modprobe cdc-acm
mount -t usbfs none /proc/bus/usb

umount /proc/bus/usb
rmmod cdc-acm
rmmod uhci-hcd

14:33:27 (none) kernel: usbcore: registered new interface driver usbfs
14:33:27 (none) kernel: usbcore: registered new interface driver hub
14:33:27 (none) kernel: usbcore: registered new device driver usb
14:33:27 (none) kernel: USB Universal Host Controller Interface driver v3.0
14:33:27 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 20 (level, low) -> IRQ 20
14:33:27 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.0 to 64
14:33:27 (none) kernel: uhci_hcd 0000:00:1d.0: UHCI Host Controller
14:33:27 (none) kernel: uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
14:33:27 (none) kernel: uhci_hcd 0000:00:1d.0: irq 20, io base 0x00006000
14:33:27 (none) kernel: usb usb1: configuration #1 chosen from 1 choice
14:33:27 (none) kernel: hub 1-0:1.0: USB hub found
14:33:27 (none) kernel: hub 1-0:1.0: 2 ports detected
14:33:28 (none) kernel: hub 1-0:1.0: Create sysfs intf files
14:33:28 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 17 (level, low) -> IRQ 17
14:33:28 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.1 to 64
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.1: UHCI Host Controller
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.1: irq 17, io base 0x00006400
14:33:28 (none) kernel: usb usb2: configuration #1 chosen from 1 choice
14:33:28 (none) kernel: hub 2-0:1.0: USB hub found
14:33:28 (none) kernel: hub 2-0:1.0: 2 ports detected
14:33:28 (none) kernel: hub 2-0:1.0: Create sysfs intf files
14:33:28 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18
14:33:28 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.2 to 64
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.2: UHCI Host Controller
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.2: irq 18, io base 0x00006800
14:33:28 (none) kernel: usb usb3: configuration #1 chosen from 1 choice
14:33:28 (none) kernel: hub 3-0:1.0: USB hub found
14:33:28 (none) kernel: hub 3-0:1.0: 2 ports detected
14:33:28 (none) kernel: hub 3-0:1.0: Create sysfs intf files
14:33:28 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 19 (level, low) -> IRQ 19
14:33:28 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.3 to 64
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.3: UHCI Host Controller
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
14:33:28 (none) kernel: uhci_hcd 0000:00:1d.3: irq 19, io base 0x00007000
14:33:28 (none) kernel: usb usb4: configuration #1 chosen from 1 choice
14:33:28 (none) kernel: hub 4-0:1.0: USB hub found
14:33:28 (none) kernel: hub 4-0:1.0: 2 ports detected
14:33:28 (none) kernel: hub 4-0:1.0: Create sysfs intf files
14:33:28 (none) kernel: usb 2-2: new full speed USB device using uhci_hcd and address 2
14:33:28 (none) kernel: usb 2-2: configuration #2 chosen from 2 choices
14:33:29 (none) kernel: 2-2:2.0: create file ffff810079aacda0 uevent
14:33:29 (none) kernel: 2-2:2.0: create group ffffffff80479960
14:33:29 (none) kernel: Add ffffffff80479980 wakeup
14:33:29 (none) kernel: usb 2-2:2.0: Create sysfs intf files
14:33:29 (none) kernel: 2-2:2.0: create group ffffffff8801c7b0
14:33:29 (none) kernel: Add ffffffff8801c960 bInterfaceNumber
14:33:29 (none) kernel: Add ffffffff8801c9a0 bAlternateSetting
14:33:29 (none) kernel: Add ffffffff8801c9e0 bNumEndpoints
14:33:29 (none) kernel: Add ffffffff8801ca20 bInterfaceClass
14:33:29 (none) kernel: Add ffffffff8801ca60 bInterfaceSubClass
14:33:29 (none) kernel: Add ffffffff8801caa0 bInterfaceProtocol
14:33:29 (none) kernel: Add ffffffff8801cae0 modalias
14:33:29 (none) kernel: 2-2:2.0: create file ffffffff8801c780 interface
14:33:29 (none) kernel: usbdev2.2_ep84: create file ffff810079aac590 uevent
14:33:29 (none) kernel: usbdev2.2_ep84: create file ffff810079ab2ec0 dev
14:33:29 (none) kernel: usbdev2.2_ep84: create group ffffffff80479960
14:33:29 (none) kernel: Add ffffffff80479980 wakeup
14:33:29 (none) kernel: usbdev2.2_ep84: create group ffffffff8801cfe0
14:33:29 (none) kernel: Add ffffffff8801d0a0 bLength
14:33:29 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:33:29 (none) kernel: Add ffffffff8801d120 bmAttributes
14:33:29 (none) kernel: Add ffffffff8801d160 bInterval
14:33:29 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:33:29 (none) kernel: Add ffffffff8801d1e0 interval
14:33:29 (none) kernel: Add ffffffff8801d220 type
14:33:29 (none) kernel: Add ffffffff8801d260 direction
14:33:29 (none) kernel: 2-2:2.1: create file ffff810079aac9a0 uevent
14:33:29 (none) kernel: 2-2:2.1: create group ffffffff80479960
14:33:29 (none) kernel: Add ffffffff80479980 wakeup
14:33:29 (none) kernel: usb 2-2:2.1: Create sysfs intf files
14:33:29 (none) kernel: 2-2:2.1: create group ffffffff8801c7b0
14:33:29 (none) kernel: Add ffffffff8801c960 bInterfaceNumber
14:33:29 (none) kernel: Add ffffffff8801c9a0 bAlternateSetting
14:33:29 (none) kernel: Add ffffffff8801c9e0 bNumEndpoints
14:33:29 (none) kernel: Add ffffffff8801ca20 bInterfaceClass
14:33:29 (none) kernel: Add ffffffff8801ca60 bInterfaceSubClass
14:33:29 (none) kernel: Add ffffffff8801caa0 bInterfaceProtocol
14:33:29 (none) kernel: Add ffffffff8801cae0 modalias
14:33:29 (none) kernel: 2-2:2.1: create file ffffffff8801c780 interface
14:33:29 (none) kernel: usbdev2.2_ep02: create file ffff810079aac190 uevent
14:33:29 (none) kernel: usbdev2.2_ep02: create file ffff810079ab2e80 dev
14:33:29 (none) kernel: usbdev2.2_ep02: create group ffffffff80479960
14:33:29 (none) kernel: Add ffffffff80479980 wakeup
14:33:29 (none) kernel: usbdev2.2_ep02: create group ffffffff8801cfe0
14:33:29 (none) kernel: Add ffffffff8801d0a0 bLength
14:33:29 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:33:29 (none) kernel: Add ffffffff8801d120 bmAttributes
14:33:29 (none) kernel: Add ffffffff8801d160 bInterval
14:33:29 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:33:29 (none) kernel: Add ffffffff8801d1e0 interval
14:33:29 (none) kernel: Add ffffffff8801d220 type
14:33:29 (none) kernel: Add ffffffff8801d260 direction
14:33:29 (none) kernel: usbdev2.2_ep86: create file ffff810079b07d90 uevent
14:33:29 (none) kernel: usbdev2.2_ep86: create file ffff810079ab2e00 dev
14:33:29 (none) kernel: usbdev2.2_ep86: create group ffffffff80479960
14:33:29 (none) kernel: Add ffffffff80479980 wakeup
14:33:29 (none) kernel: usbdev2.2_ep86: create group ffffffff8801cfe0
14:33:29 (none) kernel: Add ffffffff8801d0a0 bLength
14:33:29 (none) kernel: Add ffffffff8801d0e0 bEndpointAddress
14:33:29 (none) kernel: Add ffffffff8801d120 bmAttributes
14:33:29 (none) kernel: Add ffffffff8801d160 bInterval
14:33:29 (none) kernel: Add ffffffff8801d1a0 wMaxPacketSize
14:33:29 (none) kernel: Add ffffffff8801d1e0 interval
14:33:29 (none) kernel: Add ffffffff8801d220 type
14:33:29 (none) kernel: Add ffffffff8801d260 direction
14:33:29 (none) kernel: cdc_acm 2-2:2.0: ttyACM0: USB ACM device
14:33:29 (none) kernel: usbcore: registered new interface driver cdc_acm
14:33:29 (none) kernel: drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
14:34:19 (none) kernel: usbcore: deregistering interface driver cdc_acm
14:34:19 (none) kernel: cdc_acm 2-2:2.1: Remove sysfs intf files
14:34:19 (none) kernel: cdc_acm 2-2:2.1: Create sysfs intf files
14:34:19 (none) kernel: cdc_acm 2-2:2.0: Remove sysfs intf files
14:34:19 (none) kernel: cdc_acm 2-2:2.0: Create sysfs intf files
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.3: remove, state 1
14:34:35 (none) kernel: usb usb4: USB disconnect, address 1
14:34:35 (none) kernel: hub 4-0:1.0: Remove sysfs intf files
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.3: USB bus 4 deregistered
14:34:35 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.3 disabled
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.2: remove, state 1
14:34:35 (none) kernel: usb usb3: USB disconnect, address 1
14:34:35 (none) kernel: hub 3-0:1.0: Remove sysfs intf files
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.2: USB bus 3 deregistered
14:34:35 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.2 disabled
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.1: remove, state 1
14:34:35 (none) kernel: usb usb2: USB disconnect, address 1
14:34:35 (none) kernel: usb 2-2: USB disconnect, address 2
14:34:35 (none) kernel: usb 2-2:2.0: Remove sysfs intf files
14:34:35 (none) kernel: usbdev2.2_ep84: remove group ffffffff8801cfe0
14:34:35 (none) kernel: Remove ffffffff8801d0a0
14:34:35 (none) kernel: Remove ffffffff8801d0e0
14:34:35 (none) kernel: Remove ffffffff8801d120
14:34:35 (none) kernel: Remove ffffffff8801d160
14:34:35 (none) kernel: Remove ffffffff8801d1a0
14:34:35 (none) kernel: Remove ffffffff8801d1e0
14:34:35 (none) kernel: Remove ffffffff8801d220
14:34:35 (none) kernel: Remove ffffffff8801d260
14:34:35 (none) kernel: usbdev2.2_ep84: remove file ffff810079ab2ec0
14:34:35 (none) kernel: usbdev2.2_ep84: remove file ffff810079aac590
14:34:35 (none) kernel: usbdev2.2_ep84: remove group ffffffff80479960
14:34:35 (none) kernel: Remove ffffffff80479980
14:34:35 (none) kernel: 2-2:2.0: remove file ffffffff8801c780
14:34:35 (none) kernel: 2-2:2.0: remove group ffffffff8801c7b0
14:34:35 (none) kernel: Remove ffffffff8801c960
14:34:35 (none) kernel: Remove ffffffff8801c9a0
14:34:35 (none) kernel: Remove ffffffff8801c9e0
14:34:35 (none) kernel: Remove ffffffff8801ca20
14:34:35 (none) kernel: Remove ffffffff8801ca60
14:34:35 (none) kernel: Remove ffffffff8801caa0
14:34:35 (none) kernel: Remove ffffffff8801cae0
14:34:35 (none) kernel: 2-2:2.0: remove file ffff810079aacda0
14:34:35 (none) kernel: 2-2:2.0: remove group ffffffff80479960
14:34:35 (none) kernel: Remove ffffffff80479980
14:34:35 (none) kernel: usb 2-2:2.1: Remove sysfs intf files
14:34:35 (none) kernel: usbdev2.2_ep02: remove group ffffffff8801cfe0
14:34:35 (none) kernel: Remove ffffffff8801d0a0
14:34:35 (none) kernel: Remove ffffffff8801d0e0
14:34:35 (none) kernel: Remove ffffffff8801d120
14:34:35 (none) kernel: Remove ffffffff8801d160
14:34:35 (none) kernel: Remove ffffffff8801d1a0
14:34:35 (none) kernel: Remove ffffffff8801d1e0
14:34:35 (none) kernel: Remove ffffffff8801d220
14:34:35 (none) kernel: Remove ffffffff8801d260
14:34:35 (none) kernel: usbdev2.2_ep02: remove file ffff810079ab2e00
14:34:35 (none) kernel: usbdev2.2_ep02: remove file ffff810079b07d90
14:34:35 (none) kernel: usbdev2.2_ep02: remove group ffffffff80479960
14:34:35 (none) kernel: Remove ffffffff80479980
14:34:35 (none) kernel: usbdev2.2_ep86: remove group ffffffff8801cfe0
14:34:35 (none) kernel: Remove ffffffff8801d0a0
14:34:35 (none) kernel: Remove ffffffff8801d0e0
14:34:35 (none) kernel: Remove ffffffff8801d120
14:34:35 (none) kernel: Remove ffffffff8801d160
14:34:35 (none) kernel: Remove ffffffff8801d1a0
14:34:35 (none) kernel: Remove ffffffff8801d1e0
14:34:35 (none) kernel: Remove ffffffff8801d220
14:34:35 (none) kernel: Remove ffffffff8801d260
14:34:35 (none) kernel: usbdev2.2_ep86: remove file ffff810079ab2800
14:34:35 (none) kernel: usbdev2.2_ep86: remove file ffff810079aac190
14:34:35 (none) kernel: usbdev2.2_ep86: remove group ffffffff80479960
14:34:35 (none) kernel: Remove ffffffff80479980
14:34:35 (none) kernel: 2-2:2.1: remove file ffffffff8801c780
14:34:35 (none) kernel: 2-2:2.1: remove group ffffffff8801c7b0
14:34:35 (none) kernel: Remove ffffffff8801c960
14:34:35 (none) kernel: Remove ffffffff8801c9a0
14:34:35 (none) kernel: Remove ffffffff8801c9e0
14:34:35 (none) kernel: Remove ffffffff8801ca20
14:34:35 (none) kernel: Remove ffffffff8801ca60
14:34:35 (none) kernel: Remove ffffffff8801caa0
14:34:35 (none) kernel: Remove ffffffff8801cae0
14:34:35 (none) kernel: 2-2:2.1: remove file ffff810079aac9a0
14:34:35 (none) kernel: 2-2:2.1: remove group ffffffff80479960
14:34:35 (none) kernel: Remove ffffffff80479980
14:34:35 (none) kernel: hub 2-0:1.0: Remove sysfs intf files
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.1: USB bus 2 deregistered
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.1: dma_pool_destroy buffer-128, ffff810079b1b000 busy
14:34:35 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.1 disabled
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.0: remove, state 1
14:34:35 (none) kernel: usb usb1: USB disconnect, address 1
14:34:35 (none) kernel: hub 1-0:1.0: Remove sysfs intf files
14:34:35 (none) kernel: uhci_hcd 0000:00:1d.0: USB bus 1 deregistered
14:34:35 (none) kernel: ACPI: PCI interrupt for device 0000:00:1d.0 disabled
14:34:43 (none) kernel: usbcore: deregistering device driver usb
14:34:43 (none) kernel: usbcore: deregistering interface driver usbfs
14:34:43 (none) kernel: usbcore: deregistering interface driver hub

> 
> If you unplug the modem without unloading anything, does the error 
> occur?
> 

Plug in modem
load modules
unplug modem
modules are still loaded
kernel log reports no oops

Here is the log for this:

14:52:23 (none) kernel: usbcore: registered new interface driver usbfs
14:52:23 (none) kernel: usbcore: registered new interface driver hub
14:52:23 (none) kernel: usbcore: registered new device driver usb
14:52:23 (none) kernel: USB Universal Host Controller Interface driver v3.0
14:52:23 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 20 (level, low) -> IRQ 20
14:52:23 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.0 to 64
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.0: UHCI Host Controller
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.0: irq 20, io base 0x00006000
14:52:23 (none) kernel: usb usb1: configuration #1 chosen from 1 choice
14:52:23 (none) kernel: hub 1-0:1.0: USB hub found
14:52:23 (none) kernel: hub 1-0:1.0: 2 ports detected
14:52:23 (none) kernel: hub 1-0:1.0: Create sysfs intf files
14:52:23 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 17 (level, low) -> IRQ 17
14:52:23 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.1 to 64
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.1: UHCI Host Controller
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.1: irq 17, io base 0x00006400
14:52:23 (none) kernel: usb usb2: configuration #1 chosen from 1 choice
14:52:23 (none) kernel: hub 2-0:1.0: USB hub found
14:52:23 (none) kernel: hub 2-0:1.0: 2 ports detected
14:52:23 (none) kernel: hub 2-0:1.0: Create sysfs intf files
14:52:23 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18
14:52:23 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.2 to 64
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.2: UHCI Host Controller
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.2: irq 18, io base 0x00006800
14:52:23 (none) kernel: usb usb3: configuration #1 chosen from 1 choice
14:52:23 (none) kernel: hub 3-0:1.0: USB hub found
14:52:23 (none) kernel: hub 3-0:1.0: 2 ports detected
14:52:23 (none) kernel: hub 3-0:1.0: Create sysfs intf files
14:52:23 (none) kernel: ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 19 (level, low) -> IRQ 19
14:52:23 (none) kernel: PCI: Setting latency timer of device 0000:00:1d.3 to 64
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.3: UHCI Host Controller
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
14:52:23 (none) kernel: uhci_hcd 0000:00:1d.3: irq 19, io base 0x00007000
14:52:23 (none) kernel: usb usb4: configuration #1 chosen from 1 choice
14:52:23 (none) kernel: hub 4-0:1.0: USB hub found
14:52:23 (none) kernel: hub 4-0:1.0: 2 ports detected
14:52:24 (none) kernel: hub 4-0:1.0: Create sysfs intf files
14:52:24 (none) kernel: usbcore: registered new interface driver cdc_acm
14:52:24 (none) kernel: drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
14:52:36 (none) kernel: usb 2-2: new full speed USB device using uhci_hcd and address 2
14:52:36 (none) kernel: usb 2-2: configuration #2 chosen from 2 choices
14:52:37 (none) kernel: 2-2:2.0: create file ffff8100773765a0 uevent
14:52:37 (none) kernel: 2-2:2.0: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: 2-2:2.0: create file ffffffff88040440 bmCapabilities
14:52:37 (none) kernel: cdc_acm 2-2:2.0: ttyACM0: USB ACM device
14:52:37 (none) kernel: ttyACM0: create file ffff810076c39580 uevent
14:52:37 (none) kernel: ttyACM0: create file ffff810076caf540 dev
14:52:37 (none) kernel: ttyACM0: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: cdc_acm 2-2:2.0: Create sysfs intf files
14:52:37 (none) kernel: 2-2:2.0: create group ffffffff880327b0
14:52:37 (none) kernel: Add ffffffff88032960 bInterfaceNumber
14:52:37 (none) kernel: Add ffffffff880329a0 bAlternateSetting
14:52:37 (none) kernel: Add ffffffff880329e0 bNumEndpoints
14:52:37 (none) kernel: Add ffffffff88032a20 bInterfaceClass
14:52:37 (none) kernel: Add ffffffff88032a60 bInterfaceSubClass
14:52:37 (none) kernel: Add ffffffff88032aa0 bInterfaceProtocol
14:52:37 (none) kernel: Add ffffffff88032ae0 modalias
14:52:37 (none) kernel: 2-2:2.0: create file ffffffff88032780 interface
14:52:37 (none) kernel: usbdev2.2_ep84: create file ffff810076c39990 uevent
14:52:37 (none) kernel: usbdev2.2_ep84: create file ffff810076caf680 dev
14:52:37 (none) kernel: usbdev2.2_ep84: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: usbdev2.2_ep84: create group ffffffff88032fe0
14:52:37 (none) kernel: Add ffffffff880330a0 bLength
14:52:37 (none) kernel: Add ffffffff880330e0 bEndpointAddress
14:52:37 (none) kernel: Add ffffffff88033120 bmAttributes
14:52:37 (none) kernel: Add ffffffff88033160 bInterval
14:52:37 (none) kernel: Add ffffffff880331a0 wMaxPacketSize
14:52:37 (none) kernel: Add ffffffff880331e0 interval
14:52:37 (none) kernel: Add ffffffff88033220 type
14:52:37 (none) kernel: Add ffffffff88033260 direction
14:52:37 (none) kernel: 2-2:2.1: create file ffff8100773761a0 uevent
14:52:37 (none) kernel: 2-2:2.1: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: cdc_acm 2-2:2.1: Create sysfs intf files
14:52:37 (none) kernel: 2-2:2.1: create group ffffffff880327b0
14:52:37 (none) kernel: Add ffffffff88032960 bInterfaceNumber
14:52:37 (none) kernel: Add ffffffff880329a0 bAlternateSetting
14:52:37 (none) kernel: Add ffffffff880329e0 bNumEndpoints
14:52:37 (none) kernel: Add ffffffff88032a20 bInterfaceClass
14:52:37 (none) kernel: Add ffffffff88032a60 bInterfaceSubClass
14:52:37 (none) kernel: Add ffffffff88032aa0 bInterfaceProtocol
14:52:37 (none) kernel: Add ffffffff88032ae0 modalias
14:52:37 (none) kernel: 2-2:2.1: create file ffffffff88032780 interface
14:52:37 (none) kernel: usbdev2.2_ep02: create file ffff810077376990 uevent
14:52:37 (none) kernel: usbdev2.2_ep02: create file ffff810076caf6c0 dev
14:52:37 (none) kernel: usbdev2.2_ep02: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: usbdev2.2_ep02: create group ffffffff88032fe0
14:52:37 (none) kernel: Add ffffffff880330a0 bLength
14:52:37 (none) kernel: Add ffffffff880330e0 bEndpointAddress
14:52:37 (none) kernel: Add ffffffff88033120 bmAttributes
14:52:37 (none) kernel: Add ffffffff88033160 bInterval
14:52:37 (none) kernel: Add ffffffff880331a0 wMaxPacketSize
14:52:37 (none) kernel: Add ffffffff880331e0 interval
14:52:37 (none) kernel: Add ffffffff88033220 type
14:52:37 (none) kernel: Add ffffffff88033260 direction
14:52:37 (none) kernel: usbdev2.2_ep86: create file ffff810077376d90 uevent
14:52:37 (none) kernel: usbdev2.2_ep86: create file ffff8100784e5d00 dev
14:52:37 (none) kernel: usbdev2.2_ep86: create group ffffffff80479960
14:52:37 (none) kernel: Add ffffffff80479980 wakeup
14:52:37 (none) kernel: usbdev2.2_ep86: create group ffffffff88032fe0
14:52:37 (none) kernel: Add ffffffff880330a0 bLength
14:52:37 (none) kernel: Add ffffffff880330e0 bEndpointAddress
14:52:37 (none) kernel: Add ffffffff88033120 bmAttributes
14:52:37 (none) kernel: Add ffffffff88033160 bInterval
14:52:37 (none) kernel: Add ffffffff880331a0 wMaxPacketSize
14:52:37 (none) kernel: Add ffffffff880331e0 interval
14:52:37 (none) kernel: Add ffffffff88033220 type
14:52:37 (none) kernel: Add ffffffff88033260 direction
14:53:33 (none) kernel: usb 2-2: USB disconnect, address 2
14:53:33 (none) kernel: cdc_acm 2-2:2.0: Remove sysfs intf files
14:53:33 (none) kernel: usbdev2.2_ep84: remove group ffffffff88032fe0
14:53:33 (none) kernel: Remove ffffffff880330a0
14:53:33 (none) kernel: Remove ffffffff880330e0
14:53:33 (none) kernel: Remove ffffffff88033120
14:53:33 (none) kernel: Remove ffffffff88033160
14:53:33 (none) kernel: Remove ffffffff880331a0
14:53:33 (none) kernel: Remove ffffffff880331e0
14:53:33 (none) kernel: Remove ffffffff88033220
14:53:33 (none) kernel: Remove ffffffff88033260
14:53:33 (none) kernel: usbdev2.2_ep84: remove file ffff810076caf680
14:53:33 (none) kernel: usbdev2.2_ep84: remove file ffff810076c39990
14:53:33 (none) kernel: usbdev2.2_ep84: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980
14:53:33 (none) kernel: 2-2:2.0: remove file ffffffff88032780
14:53:33 (none) kernel: 2-2:2.0: remove group ffffffff880327b0
14:53:33 (none) kernel: Remove ffffffff88032960
14:53:33 (none) kernel: Remove ffffffff880329a0
14:53:33 (none) kernel: Remove ffffffff880329e0
14:53:33 (none) kernel: Remove ffffffff88032a20
14:53:33 (none) kernel: Remove ffffffff88032a60
14:53:33 (none) kernel: Remove ffffffff88032aa0
14:53:33 (none) kernel: Remove ffffffff88032ae0
14:53:33 (none) kernel: 2-2:2.0: remove file ffff8100773765a0
14:53:33 (none) kernel: 2-2:2.0: remove file ffffffff88040440
14:53:33 (none) kernel: ttyACM0: remove file ffff810076caf540
14:53:33 (none) kernel: ttyACM0: remove file ffff810076c39580
14:53:33 (none) kernel: ttyACM0: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980
14:53:33 (none) kernel: 2-2:2.0: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980
14:53:33 (none) kernel: usb 2-2:2.1: Remove sysfs intf files
14:53:33 (none) kernel: usbdev2.2_ep02: remove group ffffffff88032fe0
14:53:33 (none) kernel: Remove ffffffff880330a0
14:53:33 (none) kernel: Remove ffffffff880330e0
14:53:33 (none) kernel: Remove ffffffff88033120
14:53:33 (none) kernel: Remove ffffffff88033160
14:53:33 (none) kernel: Remove ffffffff880331a0
14:53:33 (none) kernel: Remove ffffffff880331e0
14:53:33 (none) kernel: Remove ffffffff88033220
14:53:33 (none) kernel: Remove ffffffff88033260
14:53:33 (none) kernel: usbdev2.2_ep02: remove file ffff810076caf6c0
14:53:33 (none) kernel: usbdev2.2_ep02: remove file ffff810077376990
14:53:33 (none) kernel: usbdev2.2_ep02: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980
14:53:33 (none) kernel: usbdev2.2_ep86: remove group ffffffff88032fe0
14:53:33 (none) kernel: Remove ffffffff880330a0
14:53:33 (none) kernel: Remove ffffffff880330e0
14:53:33 (none) kernel: Remove ffffffff88033120
14:53:33 (none) kernel: Remove ffffffff88033160
14:53:33 (none) kernel: Remove ffffffff880331a0
14:53:33 (none) kernel: Remove ffffffff880331e0
14:53:33 (none) kernel: Remove ffffffff88033220
14:53:33 (none) kernel: Remove ffffffff88033260
14:53:33 (none) kernel: usbdev2.2_ep86: remove file ffff8100784e5d00
14:53:33 (none) kernel: usbdev2.2_ep86: remove file ffff810077376d90
14:53:33 (none) kernel: usbdev2.2_ep86: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980
14:53:33 (none) kernel: 2-2:2.1: remove file ffffffff88032780
14:53:33 (none) kernel: 2-2:2.1: remove group ffffffff880327b0
14:53:33 (none) kernel: Remove ffffffff88032960
14:53:33 (none) kernel: Remove ffffffff880329a0
14:53:33 (none) kernel: Remove ffffffff880329e0
14:53:33 (none) kernel: Remove ffffffff88032a20
14:53:33 (none) kernel: Remove ffffffff88032a60
14:53:33 (none) kernel: Remove ffffffff88032aa0
14:53:33 (none) kernel: Remove ffffffff88032ae0
14:53:33 (none) kernel: 2-2:2.1: remove file ffff8100773761a0
14:53:33 (none) kernel: 2-2:2.1: remove group ffffffff80479960
14:53:33 (none) kernel: Remove ffffffff80479980


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