linux-kernel - Re: [Rt2400-devel] 2.6.25-rc2 regression in rt61pci wireless driver

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Message-Id: <1203523555.693.2.camel@localhost.localdomain>
Date:	Wed, 20 Feb 2008 11:05:54 -0500
From:	Dan Williams <dcbw@...hat.com>
To:	Chris Vine <chris@...ne.freeserve.co.uk>
Cc:	Ivo van Doorn <ivdoorn@...il.com>, chris2553@...glemail.com,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	rt2400-devel@...ts.sourceforge.net
Subject: Re: [Rt2400-devel] 2.6.25-rc2 regression in rt61pci wireless driver

On Tue, 2008-02-19 at 23:04 +0000, Chris Vine wrote:
> On Tue, 2008-02-19 at 20:46 +0100, Ivo van Doorn wrote:
> > Hi,
> > 
> > [added rt2400-devel (rt2x00 development mailinglist) to the CC list.]
> > 
> > > > > > I have a series of tests I would like to request from you,
> > > > > > you mentioned you already enabled debugfs, and that is just what we need. ;)
> > > > > > Please use attached script to create dumps of the hardware register contents.
> > > > > > 
> > > > > > There are specific moments that should be dumped:
> > > > > > - kernel 2.6.24 (last known working version for you).
> > > > > > - kernel 2.6.25-rc2 (after ifup, before TX dies)
> > > > > > - kernel 2.6.25-rc2 (after ifup, after TX dies)
> > > > > >  
> > > > > 
> > > > > These diagnostics are attached, with obvious filenames.
> > > > 
> > > > Thanks. I think I found something, please test below patch:
> > > > 
> > > 
> > > I've tried the patch but, unfortunately, my wireless LAN still dies after a few pings.
> 
> rt2x00 2.0.14 is broken with my rt73 stick in the vanilla 2.6.25-rc2
> kernel (not wireless-2.6/rt2x00 git).  The modules load when I plug the
> stick in but I then get a complete kernel lock up with two flashing
> leds.  Nothing is recorded to system logs.  The last logged messages are
> that usbcore has registered new interface driver rt73usb, and that the
> rate control algorithm has been selected on phy0.  This happens whether
> the simple or pid mac80211 rate control algorithms have been chosen.
> 
> This is a shame because 2.0.14 was working really well for me until the
> mac80211 changes 2 or 3 weeks ago broke it.  (Shortly followed by the
> release of 2.1.*).

Switch to a VT with Ctl+Alt+1, then plug the stick in, and take a
picture of the panic if one shows up.  _Something_ should show up on the
VT.

Dan


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