Re: Change channel bandwidth without iw command

[Okhwan Lee <ohlee@mwnl.snu.ac.kr>]

 Hi, 

This linked images are the printed error messages when the kernel is in panic. 
http://www.mwnl.snu.ac.kr/~ohlee/1.jpg
http://www.mwnl.snu.ac.kr/~ohlee/2.jpg

Thank you for your help.

Okhwan


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Okhwan Lee
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켜짐 2014년 10월 24일 에서 오후 4:49:23, Michal Kazior (michal.kazior@tieto.com(mailto:michal.kazior@tieto.com)) 작성됨:

> On 23 October 2014 08:57, Okhwan Lee wrote:
> > Hi,
> >
> > Thank you for your answer.
> >
> >> The panic printout would be most helpful. My best guess is this
> >> crashes in ath10k_dbg() at the very beginning of ath10k_config_chan
> >> because ar->chandef.chan is NULL. This is probably the case since you
> >> use monitor_chandef which is probably "empty" at the point you invoke
> >> your code.
> >
> > First, we confirm that ar->chandef.chan is not NULL.
> > We find out the the error occurs when "wait_for_completion_timeout" is called.
> > Ath10k is trying to stop vdev (monitor_dev) when change the channel setting.
> > We have no idea about the details of function, but it make waiting
> > time duration for previous event.
> > We also test by replacing wait_for_completion_timeout to
> > wait_for_completion (i.e., it use maximum timeout value)
> > But the kernel panic is still there.
> >
> > However, it is not easy to printout the messages when the panic is occurred,
> > because the system stop (similar to bluescreen in widnows?).
> > After reboot the system, the log messagess from panic is not recored
> > in kernel log messages (/var/log/syslog, dmesg, kernel_llog) .
>  
> Can you at least do a photo of the panic, post it to an image hosting
> site and link it, please?
>  
>  
> Michał