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• 
• Super Hero
• Posts: 5

I am running the 9260S board with the WiFi module.  It works great most of the time but periodically I get the following error listed below.  I am only running on the WiFi on the USB port and am not sure what could be causing this.  My kernel verson is 2.6.25. 

Any thoughts or solutions?  I have googled but did not find much. 

Thanks for your time.


*********************************************************************
# at91_ohci at91_ohci: OHCI Unrecoverable Error, disabled
at91_ohci at91_ohci: HC died; cleaning up
irq 20: nobody cared (try booting with the "irqpoll" option)
[<c002b034>] (dump_stack+0x0/0x14) from [<c00656cc>] (__report_bad_irq+0x3c/0x8c
)
[<c0065690>] (__report_bad_irq+0x0/0x8c) from [<c00659d8>] (note_interrupt+0x2bc
/0x314)
 r4:00000000
[<c006571c>] (note_interrupt+0x0/0x314) from [<c0066940>] (handle_level_irq+0xcc
/0x168)
[<c0066874>] (handle_level_irq+0x0/0x168) from [<c0026048>] (asm_do_IRQ+0x48/0x7
0)
 r6:c02fff38 r5:c0306338 r4:00000014
[<c0026000>] (asm_do_IRQ+0x0/0x70) from [<c0026628>] (__irq_svc+0x48/0x70)
Exception stack(0xc02ffe90 to 0xc02ffed8)
fe80:                                     00000001 c031fbc0 00000103 20000013
fea0: 00000001 00000002 0000000a c031fbc0 00000001 c032234c 00000000 c02fff04
fec0: c02fff08 c02ffed8 c0043948 c00434e8 20000013 ffffffff
 r6:00000014 r5:fefff000 r4:ffffffff
[<c0043498>] (__do_softirq+0x0/0xd0) from [<c0043948>] (irq_exit+0x48/0x64)
[<c0043900>] (irq_exit+0x0/0x64) from [<c0026058>] (asm_do_IRQ+0x58/0x70)
[<c0026000>] (asm_do_IRQ+0x0/0x70) from [<c0026628>] (__irq_svc+0x48/0x70)
Exception stack(0xc02fff38 to 0xc02fff80)
ff20:                                                       00000000 0005317f
ff40: 0005217f 60000013 c02fe000 c002814c c002814c c031a8c8 20021684 41069265
ff60: 20021650 c02fff8c 600000d3 c02fff80 c0028190 c002819c 60000013 ffffffff
 r6:00000001 r5:fefff000 r4:ffffffff
[<c002814c>] (default_idle+0x0/0x58) from [<c0028074>] (cpu_idle+0x3c/0x70)
[<c0028038>] (cpu_idle+0x0/0x70) from [<c025f774>] (rest_init+0x70/0x80)
 r7:c0301d68 r6:c0022f28 r5:c031a488 r4:c02fe000
[<c025f704>] (rest_init+0x0/0x80) from [<c0008bdc>] (start_kernel+0x290/0x2fc)
 r4:c03225f4
[<c000894c>] (start_kernel+0x0/0x2fc) from [<20008034>] (0x20008034)
handlers:
[<c01b9fa8>] (usb_hcd_irq+0x0/0x8c)
Disabling IRQ #20
usb 1-1: USB disconnect, address 2
at91_ohci at91_ohci: leak ed ffc02080 (#81) state 0 (has tds)
at91_ohci at91_ohci: leak ed ffc02040 (#82) state 0 (has tds)

*******************************************************************

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• 
• Super Hero
• Posts: 5

I am starting to become suspicious of the vntusb driver I cross compiled.  I captured a kernel panic messsage.  This brings me to several questions. 

1.  Can someone post a good working vntusb.ko so I can validate against it?
2.  Is anyone else using PREEMPTIVE mode successfully with this driver?
3.  Is anyone else using the WiFi module with success?

I am attaching the OOPs message below

********************************************************************

# Unable to handle kernel NULL pointer dereference at virtual address 00000044
pgd = c0004000
[00000044] *pgd=00000000
Internal error: Oops: 17 [#1] PREEMPT
Modules linked in: vntwusb
CPU: 0    Not tainted  (2.6.25 #5)
PC is at neigh_fill_info+0xc8/0x23c
LR is at __neigh_notify+0x54/0xd4
pc : [<c01f9898>]    lr : [<c01fa05c>]    psr: 80000013
sp : c02ffdd8  ip : c02ffe20  fp : c02ffe1c
r10: 006fba68  r9 : 00000000  r8 : c1044000
r7 : c1044010  r6 : c1032640  r5 : 00000000  r4 : c09f8820
r3 : c09f8898  r2 : 00000000  r1 : 00000001  r0 : c1032640
Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 0005317f  Table: 2106c000  DAC: 00000017
Process swapper (pid: 0, stack limit = 0xc02fe268)
Stack: (0xc02ffdd8 to 0xc0300000)
fdc0:                                                       c1032640 00000020
fde0: 00000080 c1c08d40 c02ffe1c c02ffdf8 c01edcb4 c09f8820 c1032640 0000001c
fe00: 00000000 c03305e4 c03207e8 c03209e8 c02ffe4c c02ffe20 c01fa05c c01f97e0
fe20: 0000001c 00000000 00000000 c09f8820 00000002 00000001 c01fdc30 006fbacc
fe40: c02ffe64 c02ffe50 c01fa988 c01fa018 c005c384 c09f8820 c02ffe8c c02ffe68
fe60: c01fe030 c01fa968 c031fde0 c02fe000 00000103 c01fdc30 c0320be8 c03209e8
fe80: c02ffed4 c02ffe90 c0047f18 c01fdc40 c0302a20 c02ffea0 c031aaa4 c03205e8
fea0: c02ffea0 c02ffea0 c02ffed4 c031fc04 00000001 0000000a c031fbc0 00000001
fec0: c032234c 00000000 c02fff04 c02ffed8 c0043500 c0047d90 00000002 00000001
fee0: c0305f10 00000000 00000002 00000001 c02fe000 20021650 c02fff14 c02fff08
ff00: c0043948 c00434a8 c02fff34 c02fff18 c0026058 c0043910 c00581f0 ffffffff
ff20: fefff000 00000001 c02fff8c c02fff38 c0026628 c0026010 00000000 0005317f
ff40: 0005217f 60000013 c02fe000 c002814c c002814c c031a8c8 20021684 41069265
ff60: 20021650 c02fff8c 600000d3 c02fff80 c0028190 c002819c 60000013 ffffffff
ff80: c02fffac c02fff90 c0028074 c002815c c02fe000 c031a488 c0022f28 c0301d68
ffa0: c02fffc4 c02fffb0 c025f774 c0028048 c0022f28 c03225f4 c02ffff4 c02fffc8
ffc0: c0008bdc c025f714 c00083a4 00000000 00000000 c0022f28 00000000 00053175
ffe0: c031a92c c002332c 00000000 c02ffff8 20008034 c000895c 00000000 00000000
Backtrace:
[<c01f97d0>] (neigh_fill_info+0x0/0x23c) from [<c01fa05c>] (__neigh_notify+0x54/
0xd4)
[<c01fa008>] (__neigh_notify+0x0/0xd4) from [<c01fa988>] (neigh_update_notify+0x
30/0x34)
 r8:006fbacc r7:c01fdc30 r6:00000001 r5:00000002 r4:c09f8820
[<c01fa958>] (neigh_update_notify+0x0/0x34) from [<c01fe030>] (neigh_timer_handl
er+0x400/0x438)
 r4:c09f8820
[<c01fdc30>] (neigh_timer_handler+0x0/0x438) from [<c0047f18>] (run_timer_softir
q+0x198/0x25c)
[<c0047d80>] (run_timer_softirq+0x0/0x25c) from [<c0043500>] (__do_softirq+0x68/
0xd0)
[<c0043498>] (__do_softirq+0x0/0xd0) from [<c0043948>] (irq_exit+0x48/0x64)
[<c0043900>] (irq_exit+0x0/0x64) from [<c0026058>] (asm_do_IRQ+0x58/0x70)
[<c0026000>] (asm_do_IRQ+0x0/0x70) from [<c0026628>] (__irq_svc+0x48/0x70)
Exception stack(0xc02fff38 to 0xc02fff80)
ff20:                                                       00000000 0005317f
ff40: 0005217f 60000013 c02fe000 c002814c c002814c c031a8c8 20021684 41069265
ff60: 20021650 c02fff8c 600000d3 c02fff80 c0028190 c002819c 60000013 ffffffff
 r6:00000001 r5:fefff000 r4:ffffffff
[<c002814c>] (default_idle+0x0/0x58) from [<c0028074>] (cpu_idle+0x3c/0x70)
[<c0028038>] (cpu_idle+0x0/0x70) from [<c025f774>] (rest_init+0x70/0x80)
 r7:c0301d68 r6:c0022f28 r5:c031a488 r4:c02fe000
[<c025f704>] (rest_init+0x0/0x80) from [<c0008bdc>] (start_kernel+0x290/0x2fc)
 r4:c03225f4
[<c000894c>] (start_kernel+0x0/0x2fc) from [<20008034>] (0x20008034)
Code: e5d4301e e5c7300b e594200c e2843078 (e5922044)
Kernel panic - not syncing: Fatal exception in interrupt


**********************************************************************

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• 
• Super Hero
• Posts: 5

It appears the root of this problem was due to the fact that the kernel was running in PREEMTIVE mode.  Everything is stable now.