system automatically reboot due to MC7430

[Dan Williams]

On Thu, 2016-09-01 at 12:57 +0800, dailijin wrote:
> Hi Bjorn,
> 
> 
> My device need to use 6 MC7430 modems and they can work normally  via
> libqmi. but if I  only plugin 3 SIM cards for 6 MC7430, then do live
> with 6M/2s. after run 30 minutes or more time, the system will
> automatically reboot. I captured the log as below。

I see GobiSerial there, but qmi_wwan.  Is there some reason not to use
qcserial instead of GobiSerial?  In any case, that's probably not the
issue here.

> Aug 31 07:03:38 tvupack systemd[1]: ntpd.service: main process
> exited, code=exited, status=1/FAILURE
> Aug 31 07:03:38 tvupack systemd[1]: Unit ntpd.service entered failed
> state.
> Aug 31 07:03:42 tvupack perl[1487]: tvudial  : slotid: 5, using dev 0
> -> cdc-wdm1 to dial MC7430
> Aug 31 07:03:42 tvupack perl[1487]: tvudial  : slotid: 5, using dev 0
> -> wwan0 to dial MC7430, diaing net name: wwan0
> Aug 31 07:03:45 tvupack kernel: usb 1-1.6.2: USB disconnect, device
> number 109
> Aug 31 07:03:45 tvupack kernel: GobiSerial driver ttyUSB11:
> GobiSerial converter now disconnected from ttyUSB11
> Aug 31 07:03:45 tvupack kernel: GobiSerial 1-1.6.2:1.2: device
> disconnected
> Aug 31 07:03:45 tvupack kernel: GobiSerial driver ttyUSB12:
> GobiSerial converter now disconnected from ttyUSB12
> Aug 31 07:03:45 tvupack kernel: GobiSerial 1-1.6.2:1.3: device
> disconnected
> Aug 31 07:03:45 tvupack kernel: qmi_wwan 1-1.6.2:1.8 wwan10:
> unregister 'qmi_wwan' usb-0000:00:1d.0-1.6.2, WWAN/QMI device
> Aug 31 07:03:45 tvupack kernel: qmi_wwan 1-1.6.2:1.10 wwan11:
> unregister 'qmi_wwan' usb-0000:00:1d.0-1.6.2, WWAN/QMI device
> Aug 31 07:03:45 tvupack kernel: skbuff: skb_under_panic:
> text:ffffffff816a609d len:216 put:65 head:ffff880005a21e00
> data:ffff880005a21dff tail:0xd7 end:0x640 dev:wwan2

Kernel 3.8 is fairly old at this point, have you done backports of the
qmi_wwan/cdc-wdm/usbnet driver stack for fixes that have been done in
later kernels?  Or is the qmi_wwan driver in this kernel the one that
shipped with 3.8?

Dan


> 
> My customer don't reproduce this issue when use MC7330 instead
> of  all MC7430. so I guess this maybe related to  MC7430 modem.  Is
> there anyone report the similar issue to you? or could you give me
> investigation direction ?
> 
> 
> Note,
> 
> 
> My kernel version is 3.8, system is Gentoo
> 
> 
> Thanks in advance.
> 
> 
> 
> 
> 
> 
> 
> --
> 
> Best Regards,
> Dai,Lijin
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