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
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Andreas Stewering-Bone
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Mit freundlichem Gruß
Andreas Stewering-Bone
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Dipl.-Ing.(FH) Andreas Stewering-Bone
[email protected]
Tel.: +49 201 / 36014-15
Ingenieurgemeinschaft IgH
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