RE: iwl4965 dropping packets and __dev_addr_discard: address leakage! da_users=1

[Chatre, Reinette]

On Monday, February 25, 2008 10:48 PM, Tim Connors  wrote:

> On Mon, 25 Feb 2008, Andrew Morton wrote:
> 
>> On Tue, 26 Feb 2008 16:22:43 +1100 Tim Connors
> <tconnors@xxxxxxxxxxxxxxxxx> wrote:
>> 
>>> Possibly because of the frequent renegotiating my iwl4965 card has
>>> been making, it has now decided it's not going to pass packets
>>> reliably until presumably next time I reboot.
>>> 
>>> I've noticed messages in syslog that I hadn't seen when things were
>>> working fine.  The problem possibly has only surfaced after
>>> rmmodding the iwl4965 module, then remodding it.  It stays with me
>>> through being removed and modprobed again.  It is being bonded in
>>> conjunction with a physical ethernet, if that is relevant, although
>>> I think I reproduced it when it was on its lonesome.
>>> 
>>> 
>>> Fresh after reboot:
>>> 
>>> Feb 22 09:49:31 dirac kernel: iwl4965: Intel(R) Wireless
> WiFi Link 4965AGN driver for Linux, 1.1.17kds
>>> Feb 22 09:49:31 dirac kernel: iwl4965: Copyright(c) 2003-2007 Intel
>>> Corporation Feb 22 09:49:31 dirac kernel: ACPI: PCI Interrupt
> 0000:0c:00.0[A] -> GSI 17 (level, low) -> IRQ 17
>>> Feb 22 09:49:31 dirac kernel: PCI: Setting latency timer of device
>>> 0000:0c:00.0 to 64 Feb 22 09:49:31 dirac kernel: iwl4965: Detected
>>> Intel Wireless WiFi Link 4965AGN Feb 22 09:49:31 dirac kernel:
>>> ACPI: PCI Interrupt 
> 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 21
>>> Feb 22 09:49:31 dirac kernel: PCI: Setting latency timer of device
>>> 0000:00:1b.0 to 64 Feb 22 09:49:31 dirac kernel: iwl4965: Tunable
>>> channels: 
> 11 802.11bg, 13 802.11a channels
>>> Feb 22 09:49:31 dirac kernel: phy0: Selected rate control algorithm
>>> 'iwl-4965-rs' 
>>> 
>>> now finished with it, will be deconfigured and rmmodded:
>>> 
>>> Feb 23 03:05:23 dirac kernel: __dev_addr_discard: address leakage!
>>> da_users=1 Feb 23 03:05:23 dirac kernel: ACPI: PCI interrupt for
>>> device 0000:0c:00.0 disabled 
>>> 
>>> The modprobed again:
>>> 
>>> Feb 23 03:05:35 dirac kernel: iwl4965: Intel(R) Wireless
> WiFi Link 4965AGN driver for Linux, 1.1.17kds
>>> Feb 23 03:05:35 dirac kernel: iwl4965: Copyright(c) 2003-2007 Intel
>>> Corporation Feb 23 03:05:35 dirac kernel: ACPI: PCI Interrupt
> 0000:0c:00.0[A] -> GSI 17 (level, low) -> IRQ 17
>>> Feb 23 03:05:35 dirac kernel: PCI: Setting latency timer of device
>>> 0000:0c:00.0 to 64 Feb 23 03:05:35 dirac kernel: iwl4965: Detected
>>> Intel Wireless WiFi Link 4965AGN Feb 23 03:05:35 dirac kernel:
>>> iwl4965: Tunable channels: 
> 11 802.11bg, 13 802.11a channels
>>> Feb 23 03:05:35 dirac kernel: phy9: Selected rate control algorithm
>>> 'iwl-4965-rs' 
>>> 
>>> according to lspci -vvv, 0c:00.0 is:
>>> 
>>> 0c:00.0 Network controller: Intel Corporation PRO/Wireless
> 4965 AG or AGN Network Connection (rev 61)
>>>         Subsystem: Intel Corporation Unknown device 1120
>>>         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV-
> VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
>>>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr-
> DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>         Latency: 0, Cache Line Size: 64 bytes
>>>         Interrupt: pin A routed to IRQ 379
>>>         Region 0: Memory at f9ffe000 (64-bit, non-prefetchable)
>>>         [size=8K] Capabilities: [c8] Power Management version 3
>>>                 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>>                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>>>         Capabilities: [d0] Message Signalled Interrupts: Mask-
>>>                 64bit+ Queue=0/0 Enable+ Address: 00000000fee0300c 
>>>         Data: 4194 Capabilities: [e0] Express (v1) Endpoint, MSI 00
>>>                 DevCap: MaxPayload 128 bytes, PhantFunc 0,
> Latency L0s <512ns, L1 unlimited
>>>                         ExtTag- AttnBtn- AttnInd- PwrInd- RBE+
>>>                 FLReset- DevCtl: Report errors: Correctable-
>>>                         Non-Fatal- Fatal- Unsupported- RlxdOrd+
>>>                         ExtTag- PhantFunc- AuxPwr- NoSnoop+
>>>                 MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta:
>>>                 CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+
>>> TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x1, 
> ASPM L0s L1, Latency L0 <128ns, L1 <64us
>>>                         ClockPM+ Suprise- LLActRep- BwNot-
>>>                 LnkCtl: ASPM L0s Enabled; RCB 64 bytes Disabled-
>>>                         Retrain- CommClk+ ExtSynch- ClockPM-
>>>                 AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s,
>>> Width x1, TrErr- 
> Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
>>>         Capabilities: [100] Advanced Error Reporting <?>
>>>         Capabilities: [140] Device Serial Number
>>>         d7-36-9b-ff-ff-e8-13-00 Kernel driver in use: iwl4965
>>>         Kernel modules: iwl4965
>> 
>> (cc linux-wireless)
>> 
>> What kernel version is this?
>> 
>> Is this a regression from an earlier kenrel version?  If so, which?
> 
> kernel 2.6.24
> version 4.44.1.20 of the firmware.
> 
> The iwl4965 version is fairly ancient in mainline kernel: 1.1.17kds
> Last time I looked, 1.2.24 was the latest version, but I never
> succeeded in getting it to work (or compile?) in 2.6.24.
> 

You can use the latest iwlwifi driver with kernel 2.6.24 when using the
compat-wireless project (http://linuxwireless.org/en/users/Download).

You can also load the driver with debugging (modprobe iwl4965
debug=0x43fff) to get more info about what happens during module unload.

Reinette
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