Re: Fast channel switching

Vishal Sevani <[email protected]>
Newsgroups gmane.linux.drivers.madwifi.user
Message-ID <[email protected]>
On Sat, Feb 20, 2010 at 5:00 AM, Pavel Roskin <[email protected]> wrote:

> On Fri, 2010-02-19 at 15:17 +0530, Vishal Sevani wrote:
>
> >         > I did apply the following patch
> >         > https://madwifi-project.org/ticket/2322 , but to no avail.
> >         Could you
> >         > point out as to what the problem could be?? If you need me
> >         to provide
> >         > any other debug information please do let me know.
> >
> >
> >         I'll appreciate if you post your results to the ticket.  So
> >         far there
> >         have been no test results for that patch at all.
> >
> > Yeah I have posted my experience in the following ticket.
> > https://madwifi-project.org/ticket/2359
>
> I actually I meant that you would report a negative result with the
> patch in #2322.  But it looks like the problems are different.
>
> Yeah it seems more of a hardware issue with AR71xx borad, (or issue with
Openwrt) as pointed out by [email protected] in his comment following yours
in the ticket #2359. If Iam correct, it is happening because the value in
reg AR_ISR corresponding to flag AR_ISR_HIUERR is being set, which is for
unexpected bus error. As mentioned in the following post
http://n2.nabble.com/fatal-interrupt-td3225930.html, it is beacuse the
following bit, AR_ISR_S2_MCABT  (for master cycle abort) is being set.

Iam clueless as to what could be causing this master cycle abort problem and
how should I go about debugging it. Could you please provide any pointers as
to how I can rectify this problem.


> > Yesterday again I tried with latest release of Openwrt Kamikaze  ie.
> > v8.09.2, but still I get the same problem. But the madwifi code works
> > properly on IBM latop running Ubuntu with Linux kernel 2.6.24-23. So I
> > guess it is the issue with Openwrt or the hardware ie. AR71xx boards.
> > Has the latest code been tested on Openwrt and Ar71xx boards??
>
> I'm not aware of it.
>
> --
> Regards,
> Pavel Roskin
>

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