hello,

What is status of this bug?

What more information is required?

We hit that same bug on our system. This seems to be related with:
http://bugzilla.kernel.org/show_bug.cgi?id=13316

According other report in internet this seems to be unrelated with that same device
nor with kernel version. This seems to be fundamental bug in USB subsystem. I think this is
related with URB packet which wasn't completed becaouse device is lost, but khubd still
waiting for completion responce.

Jun 14 06:25:01 host kernel: imklog 3.18.6, log source = /proc/kmsg started.
Jun 15 06:25:01 host kernel: imklog 3.18.6, log source = /proc/kmsg started.
Jun 16 00:36:55 host kernel: [600606.885265] usb 6-1: USB disconnect, address 3
Jun 16 00:39:02 host kernel: [600738.152638] INFO: task khubd:271 blocked for more than 120 seconds.
Jun 16 00:39:02 host kernel: [600738.152682] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 16 00:39:02 host kernel: [600738.155993] khubd D ffff810916ca1400 0 271 2
Jun 16 00:39:02 host kernel: [600738.156038] ffff810919523d50 0000000000000046 363030365b3e363c 36323538382e3630
Jun 16 00:39:02 host kernel: [600738.156118] ffff810919521470 ffff810916dad220 ffff8109195216f8 00000000a00745a2
Jun 16 00:39:02 host kernel: [600738.156197] ffff810919523da4 ffff810916ca1600 0000000000000286 ffff8109148851c0
Jun 16 00:39:02 host kernel: [600738.156245] Call Trace:
Jun 16 00:39:02 host kernel: [600738.156308] [<ffffffff8039035a>] usb_kill_urb+0xa8/0xdb
Jun 16 00:39:02 host kernel: [600738.156612] [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
Jun 16 00:39:02 host kernel: [600738.156660] [<ffffffff8038fa32>] usb_hcd_flush_endpoint+0xd4/0xeb
Jun 16 00:39:02 host kernel: [600738.156707] [<ffffffff80390a8e>] usb_disable_endpoint+0x5b/0x6d
Jun 16 00:39:02 host kernel: [600738.156752] [<ffffffff80390ac5>] usb_disable_device+0x25/0xe8
Jun 16 00:39:02 host kernel: [600738.156792] [<ffffffff8038c9cd>] usb_disconnect+0x92/0x142
Jun 16 00:39:02 host kernel: [600738.156830] [<ffffffff8038dc07>] hub_thread+0x3f9/0xcfd
Jun 16 00:39:02 host kernel: [600738.156868] [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
Jun 16 00:39:02 host kernel: [600738.156910] [<ffffffff8038d80e>] hub_thread+0x0/0xcfd
Jun 16 00:39:02 host kernel: [600738.156952] [<ffffffff80245feb>] kthread+0x47/0x74
Jun 16 00:39:02 host kernel: [600738.156993] [<ffffffff8023008d>] schedule_tail+0x27/0x5c
Jun 16 00:39:02 host kernel: [600738.157036] [<ffffffff8020cf38>] child_rip+0xa/0x12
Jun 16 00:39:02 host kernel: [600738.157077] [<ffffffff80245fa4>] kthread+0x0/0x74
Jun 16 00:39:02 host kernel: [600738.157116] [<ffffffff8020cf2e>] child_rip+0x0/0x12
Jun 16 00:39:02 host kernel: [600738.157154]

device: lsusb -v -d 0403:

Bus 004 Device 002: ID 0403:c580 Future Technology Devices International, Ltd
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0xc580
bcdDevice 1.01
iManufacturer 1 OEM
iProduct 2 HID UNIKEY
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 32
Report Descriptor: (length is 32)
Item(Global): Usage Page, data= [ 0xa0 0xff ] 65440
(null)
Item(Local ): Usage, data= [ 0xa2 ] 162
(null)
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Local ): Usage, data= [ 0xa3 ] 163
(null)
Item(Main ): Collection, data= [ 0x03 ] 3
Report
Item(Global): Usage Page, data= [ 0xa1 0xff ] 65441
(null)
Item(Local ): Usage, data= [ 0xa4 ] 164
(null)
Item(Global): Logical Minimum, data= [ 0x81 ] 129
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Physical Minimum, data= [ 0x00 ] 0
Item(Global): Physical Maximum, data= [ 0xff ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x18 ] 24
Item(Main ): Feature, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Main ): End Collection, data=none
Item(Main ): End Collection, data=none
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Device Status: 0x0000
(Bus Powered)




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On Wed, 2010-06-16 at 11:12 +0300, rokas wrote:
> hello,
>
> What is status of this bug?
>
> What more information is required?

Probably none.

> We hit that same bug on our system. This seems to be related with:
> http://bugzilla.kernel.org/show_bug.cgi?id=13316
>
> According other report in internet this seems to be unrelated with that same device
> nor with kernel version. This seems to be fundamental bug in USB subsystem.

Could be. There seems to be active discussion of this at
<http://thread.gmane.org/gmane.linux.kernel/999410>. Oh, this
'accelerator57' looks like a lot like your 'host'! Perhaps you should
have cc'd this bug rather than starting two separate discussions.

> I think this is
> related with URB packet which wasn't completed becaouse device is lost, but khubd still
> waiting for completion responce.
[...]

khubd is waiting for the host controller to return the URB (which is a
buffer, not a packet). Even though the device has gone away, the host
controller must return the URB within a short time.

Ben.

--
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.