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iwlagn: Random "Time out reading EEPROM".

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Hi,

From time to time, my Intel Wifi adapter fail on cold boot, with the following in dmesg:

[    7.442634] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27ks
[    7.442636] iwlagn: Copyright(c) 2003-2009 Intel Corporation
[    7.442701] iwlagn 0000:05:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[    7.442708] iwlagn 0000:05:00.0: setting latency timer to 64
[    7.442788] iwlagn 0000:05:00.0: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
[    7.455547] iwlagn 0000:05:00.0: Time out reading EEPROM[0]
[    7.455611] iwlagn 0000:05:00.0: Unable to init EEPROM
[    7.455678] iwlagn 0000:05:00.0: PCI INT A disabled
[    7.455685] iwlagn: probe of 0000:05:00.0 failed with error -110

After "modprobe -r iwlagn ; modprobe iwlagn" or after a reboot, everything work fine:

[  346.332166] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27ks
[  346.332169] iwlagn: Copyright(c) 2003-2009 Intel Corporation
[  346.332225] iwlagn 0000:05:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[  346.332234] iwlagn 0000:05:00.0: setting latency timer to 64
[  346.332277] iwlagn 0000:05:00.0: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
[  346.365739] iwlagn 0000:05:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
[  346.365787]   alloc irq_desc for 33 on node -1
[  346.365788]   alloc kstat_irqs on node -1
[  346.365804] iwlagn 0000:05:00.0: irq 33 for MSI/MSI-X
[  346.449989] phy0: Selected rate control algorithm 'iwl-agn-rs'

This happens using 2.6.32-5 from Debian. I didn't had the opportunity to reproduce it using recent kernel, but it occurs too rarely to conclude anything.

I had a look at the git log, without finding something that seems related to this problem. Does this ring a bell for someone?

	Nicolas.

05:00.0 Network controller: Intel Corporation WiFi Link 5100
        Subsystem: Intel Corporation WiFi Link 5100 AGN
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 33
        Region 0: Memory at d6d00000 (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 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
                Address: 00000000fee0300c  Data: 41c9
        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+ FLReset-
                        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 <32us
                        ClockPM+ Surprise- LLActRep- BwNot-
                LnkCtl: ASPM L1 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 v1] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
                CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
                AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-
        Capabilities: [140 v1] Device Serial Number 00-22-fb-ff-ff-28-46-c8
        Kernel driver in use: iwlagn

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