system automatically reboot due to MC7430

[dailijin]

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。


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


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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