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Message-ID: <46642977.6020704@gmail.com>
Date: Mon, 04 Jun 2007 17:02:15 +0200
From: Trifon Trifonov <triffon@...il.com>
To: linux-kernel@...r.kernel.org
Subject: uhci_hcd: host system error
Hello all,
I am using kernel 2.6.20-16 (Ubuntu Feisty). Occasionally I am getting
USB host controller halts. If I manually remove and reinsert the
uhci_hcd module, everything is back to normal. I recompiled the kernel
with the CONFIG_USB_DEBUG option on and waited until a halt occurred.
The devices I had connected were:
Bus 005 Device 002: ID eb1a:2750 eMPIA Technology, Inc.
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 003: ID 045e:008c Microsoft Corp. Wireless Intellimouse
Explorer 2.0
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
The entry in the syslog indicating the halt are the following:
Jun 4 16:00:53 localhost kernel: [ 355.820000] uhci_hcd 0000:00:1d.3:
host system error, PCI problems?
Jun 4 16:00:53 localhost kernel: [ 355.820000] uhci_hcd 0000:00:1d.3:
host controller halted, very bad!
Jun 4 16:00:53 localhost kernel: [ 355.820000] uhci_hcd 0000:00:1d.3:
HC died; cleaning up
Jun 4 16:00:53 localhost kernel: [ 355.820000] hub 4-0:1.0: state 0
ports 2 chg 0000 evt 0000
Jun 4 16:00:53 localhost kernel: [ 355.820000] usb 4-1: USB
disconnect, address 2
Jun 4 16:00:53 localhost kernel: [ 355.820000] usb 4-1: unregistering
device
Jun 4 16:00:53 localhost kernel: [ 355.820000] usb 4-1:
usb_disable_device nuking all URBs
Jun 4 16:00:53 localhost kernel: [ 355.820000] uhci_hcd 0000:00:1d.3:
shutdown urb dfc4a840 pipe 40408280 ep1in-intr
Jun 4 16:00:53 localhost kernel: [ 355.824000] usb 4-1: unregistering
interface 4-1:1.0
Jun 4 16:00:53 localhost kernel: [ 355.824000] usbdev4.2_ep81:
ep_device_release called for usbdev4.2_ep81
Jun 4 16:00:53 localhost kernel: [ 355.824000] usb 4-1:1.0: uevent
Jun 4 16:00:53 localhost kernel: [ 355.824000] usbdev4.2_ep00:
ep_device_release called for usbdev4.2_ep00
Jun 4 16:00:53 localhost kernel: [ 355.824000] usb 4-1: uevent
I also used debugfs to monitor to status of the hubs. After the halt,
the 0000:00:1d.3 had the following content:
Root-hub state: reset FSBR: 0
HC status
usbcmd = 0000 Maxp32
usbstat = 0020 HCHalted
usbint = 0000
usbfrnum = (0)000
flbaseadd = 1fd04000
sof = 40
stat1 = 01a3 LowSpeed ConnectChange Connected
stat2 = 0080
Most recent frame: 54cb9 (185) Last ISO frame: 54cb9 (185)
After the manual reset of the host controllers, the file contained
Root-hub state: running FSBR: 0
HC status
usbcmd = 00c1 Maxp64 CF RS
usbstat = 0000
usbint = 000f
usbfrnum = (1)ef0
flbaseadd = 1acf4ef0
sof = 40
stat1 = 01a5 LowSpeed Enabled Connected
stat2 = 0080
Most recent frame: 2b76f (879) Last ISO frame: 2b76f (879)
I don't think that the device connected actually matters, because I have
had the same halts with different devices. Here is the relevant output
from lspci -vv:
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
#1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems Unknown device 0f69
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 19
Region 4: I/O ports at ec00 [size=32]
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
#2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems Unknown device 0f69
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin B routed to IRQ 20
Region 4: I/O ports at e880 [size=32]
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
#3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems Unknown device 0f69
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin C routed to IRQ 21
Region 4: I/O ports at e800 [size=32]
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
#4 (rev 02) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems Unknown device 0f69
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin D routed to IRQ 22
Region 4: I/O ports at e480 [size=32]
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
Controller (rev 02) (prog-if 20 [EHCI])
Subsystem: Elitegroup Computer Systems Unknown device 0f69
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin C routed to IRQ 21
Region 0: Memory at ffefbc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [58] Debug port
Can anyone suggest what the problem could be? Could I hope for any fix
(or a quirk), which could overcome the crashes?
When replying, please CC: my email. Thank you.
Trifon Trifonov
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