Sierra MC7354

[szlin]

2014-03-10 23:19 GMT+08:00 Bjørn Mork <bjorn at mork.no>:
> szlin <lin.sunze at gmail.com> writes:
>
>> Hi,
>>
>> Module name:          Sierra MC7354
>> Vendor/Product ID:  0x1199/ 0x68c0
>
> huh? Is that device supported by qmi_wwan?  Care to send a patch?
>

Sure, I'll send workable patch after resolving this issue.

>
>> LIBQMI version:      1.8
>> Linux version:          3.12
>>
>> I got the following error message *in sometimes*, after seeing that ,
>> system will be crashed.
>>
>> #qmi-network /dev/cdc-wdm0 start
>> Loading profile...
>>     APN: Internet
>> Starting network with 'qmicli -d /dev/cdc-wdm0
>> --wds-start-network=Internet  --client-no-release-cid'...
>> Saving state... (CID: 9)
>> Saving state... (PDH: 1205534464)
>> Network started successfully
>>
>> #qmicli -d /dev/cdc-wdm0 --get-service-version-info
>> [   79.644073] qmi_wwan 1-1:1.8: nonzero urb status received: -EPIPE
>> [10 Mar 2014, 20:22:03] -Warning ** Error reading from istream: Error
>> reading from file descriptor: Input/output error
>>
>> error: couldn't get service version info: Transaction timed out
>
> Hmm, wonder if that isn't a symptom of a firmware crash maybe?

After seeing error message,  the system is frozen without any kernel
panic/oops msg.
(ping is available but other service such like ssh is unavailable)

I'll keep trace on communication protocol between module and qmi_wwan.
Any suggestions are welcome!
Thank you.

>
> This crashes the kernel?  If so, then do you have any possibility of
> getting me the oops message?  A readable picture of the screen will do.
>
>
>
> Bjørn