[etherlab-users] Kernel Oops with ethercat-1.5.1 and kernel 2.6.37
Andreas Stewering-Bone
ab at igh-essen.com
Thu Apr 5 09:43:33 CEST 2012
Hello William,
Maybe we should talk to Florian,
he has ported the driver.
I think, but I do not know exactly, the ethercat drive generally should
not register in the netdev queques.
Normally we check on "if (adapter->ecdev)" before.
On the other side, do you have the chance to use a realtek chipset? This
chips run very well.
Best regards
Andreas
Am 04.04.2012 22:45, schrieb William Montgomery:
> Hi Andreas,
>
> It does look like a bug. I have traced it to a line in the e1000 driver:
> e1000_main-2.6.37-ethercat.c
> the e1000_open call works fine up to and including
> e1000_irq_enable(adapter) but we get the NULL pointer reference in
> netif_start_queue(netdev);
>
> A snippet from the objdump:
> ------
> 6a28: 8b 40 08 mov 0x8(%eax),%eax
> netif_schedule_queue(netdev_get_tx_queue(dev, i));
> }
>
> static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
> {
> clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
> 6a2b: 8b 83 c0 01 00 00 mov 0x1c0(%ebx),%eax
> 6a31: f0 80 60 08 fe lock andb $0xfe,0x8(%eax)
> --------
> It looks like the NULL pointer is used in the clear_bit call but I
> dont know why the netdev_get_tx_queue() wouldn't return a good value?
>
> I would like to help fix this if possible.
>
> Regards,
> Wm
>
> On 04/04/2012 03:37 AM, Andreas Stewering-Bone wrote:
>> Hello Willam,
>>
>> please try the generic driver.
>>
>> The e1000 driver is a little bit tricky, maybe there is a bug.
>>
>> Best regards
>>
>> Andreas
>>
>> Am 03.04.2012 18:26, schrieb William Montgomery:
>>> My setup:
>>> Slackware 13.37
>>> kernel 2.6.37.6-smp
>>> ethercat-1.5.1 (configured with --enable-e1000)
>>>
>>> I get a kernel Oops when I invoke /etc/init.d/ethercat start.
>>> Sometimes the machine hangs completely other times I can get more
>>> details
>>> from syslog:
>>>
>>> Apr 3 11:57:07 c130ctltst2 python: hp-systray[2215]: warning:
>>> hp-systray should not be run as root/superuser.
>>> Apr 3 11:57:07 c130ctltst2 python: hp-systray[2215]: error:
>>> hp-systray cannot be run as root. Exiting.
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221363] BUG: unable to
>>> handle kernel NULL pointer dereference at 00000008
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221394] IP: [<f8697998>]
>>> e1000_open+0xc8/0x140 [ec_e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221419] *pde = 00000000
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221431] Oops: 0002 [#1] SMP
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221446] last sysfs file:
>>> /sys/module/ec_master/initstate
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221465] Modules linked
>>> in: ec_e1000(+) ec_master ipv6 lp fuse i915 drm_kms_helper drm
>>> intel_agp i2c_algo_bit intel_
>>> gtt psmouse usbhid video hid agpgart thermal fan rtc_cmos serio_raw
>>> processor thermal_sys evdev sg rtc_core e1000e output ppdev i2c_i801
>>> hwmon i2c_core rtc_li
>>> b shpchp parport_pc parport button [last unloaded: e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221606]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221613] Pid: 2392, comm:
>>> modprobe Not tainted 2.6.37.6-smp #2 To be filled by O.E.M. To be
>>> filled by O.E.M./To be f
>>> illed by O.E.M.
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221659] EIP:
>>> 0060:[<f8697998>] EFLAGS: 00010286 CPU: 2
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221679] EIP is at
>>> e1000_open+0xc8/0x140 [ec_e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221697] EAX: 00000000
>>> EBX: f714c000 ECX: f648f85c EDX: f714c000
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221717] ESI: 00000000
>>> EDI: f714c400 EBP: f5afdd4c ESP: f5afdd40
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221738] DS: 007b ES:
>>> 007b FS: 00d8 GS: 00e0 SS: 0068
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221756] Process modprobe
>>> (pid: 2392, ti=f5afc000 task=f586ee80 task.ti=f5afc000)
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221781] Stack:
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221788] f648f85c
>>> f648f85c f714c106 f5afdd60 f8a089c1 313a3030 31323a42 f7214400
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221823] f5afdd78
>>> f8a08a28 05218120 f7214400 f7214400 f714c400 f5afddd8 f86a0f8b
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221858] f5afddca
>>> 00000008 f5afddac c11500ca f6a165d0 f5afdda4 f5b0cc88 f714c100
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221892] Call Trace:
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221906] [<f8a089c1>] ?
>>> ec_device_open+0xd1/0x120 [ec_master]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221928] [<f8a08a28>] ?
>>> ecdev_open+0x18/0x70 [ec_master]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221949] [<f86a0f8b>] ?
>>> e1000_probe+0x9aa/0xba8 [ec_e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221972] [<c11500ca>] ?
>>> sysfs_addrm_finish+0x1a/0xb0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.221992] [<c15863a5>] ?
>>> pm_runtime_enable+0x45/0x70
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222010] [<c15047d7>] ?
>>> local_pci_probe+0x47/0xb0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222028] [<c1504d98>] ?
>>> pci_device_probe+0x68/0x90
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222046] [<c157f96f>] ?
>>> driver_probe_device+0x7f/0x190
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222064] [<c150475b>] ?
>>> pci_match_device+0xab/0xc0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222082] [<c157fb01>] ?
>>> __driver_attach+0x81/0x90
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222099] [<c157eaf9>] ?
>>> bus_for_each_dev+0x49/0x70
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222117] [<c157f67e>] ?
>>> driver_attach+0x1e/0x20
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222134] [<c157fa80>] ?
>>> __driver_attach+0x0/0x90
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222151] [<c157f24a>] ?
>>> bus_add_driver+0xca/0x2b0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222168] [<c1505ad0>] ?
>>> pci_device_remove+0x0/0xf0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222186] [<c157fd36>] ?
>>> driver_register+0x66/0x110
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222204] [<c109f0cd>] ?
>>> ftrace_process_locs+0x15d/0x250Apr 3 11:59:11 c130ctltst2 kernel:
>>> [ 476.222223] [<c1504fc5>] ? __pci_register_driver+0x45/0xb0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222244] [<f854204b>] ?
>>> e1000_init_module+0x4b/0x83 [ec_e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222265] [<c1001235>] ?
>>> do_one_initcall+0x35/0x170
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222284] [<f8542000>] ?
>>> e1000_init_module+0x0/0x83 [ec_e1000]
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222305] [<c107777b>] ?
>>> sys_init_module+0x10b/0x18b0
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222327] [<c19dd5ac>] ?
>>> syscall_call+0x7/0xb
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222343] Code: 98 09 00 00
>>> fb 8b 87 88 01 00 00 a8 01 0f 84 8c 00 00 00 f0 80 a7 88 01 00 00 fe
>>> 8b 8f cc 05 00 00 85
>>> c9 74 5e 8b 83 c0 01 00 00 <f0> 80 60 08 fe b8 04 00 00 00 8b 97 f0
>>> 01 00 00 89 82 c8 00 00
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222490] EIP: [<f8697998>]
>>> e1000_open+0xc8/0x140 [ec_e1000] SS:ESP 0068:f5afdd40
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.222520] CR2:
>>> 0000000000000008
>>> Apr 3 11:59:11 c130ctltst2 kernel: [ 476.229386] ---[ end trace
>>> 53d4103391925e37 ]---
>>>
>>> Any ideas?
>>>
>>> Regards,
>>> Wm
>>>
>>> _______________________________________________
>>> etherlab-users mailing list
>>> etherlab-users at etherlab.org
>>> http://lists.etherlab.org/mailman/listinfo/etherlab-users
>>
>>
>> Mit freundlichem Gruß
>>
>> Andreas Stewering-Bone
>>
>
> _______________________________________________
> etherlab-users mailing list
> etherlab-users at etherlab.org
> http://lists.etherlab.org/mailman/listinfo/etherlab-users
Mit freundlichem Gruß
Andreas Stewering-Bone
--
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Dipl.-Ing.(FH) Andreas Stewering-Bone
andreas.stewering-bone at igh-essen.com
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