kern/163318: [ath] ath(4) stops working

[Joel Dahl]

The following reply was made to PR kern/163318; it has been noted by GNATS.

From: Joel Dahl <joel at freebsd.org>
To: Adrian Chadd <adrian.chadd at gmail.com>
Cc: bug-followup at freebsd.org
Subject: Re: kern/163318: [ath] ath(4) stops working
Date: Sun, 11 Mar 2012 21:13:46 +0100

 On 11-03-2012 13:07, Adrian Chadd wrote:
 > Hi!
 > 
 > On 11 March 2012 13:01, Joel Dahl <joel at freebsd.org> wrote:
 > > Some news...
 > >
 > > I updated from a Jan 18 CURRENT to a Feb 19 CURRENT some time ago and the
 > > issue was gone. Adrian asked me to try to track down the revision that fixed
 > > the problem, and that's what I've been doing for the last two weeks.
 > 
 > Sweet!
 > 
 > 
 > > Revision 231852 does not survive for very long. It dies as usual. I haven't
 > > been able to make any revision before 231852 survive longer than 8 hours.
 > >
 > > Revision 231854 has survived my 12 hour testing period 3 times and I haven't
 > > been able to crash any revision after 231854.
 > >
 > > Adrian, your commit to the ath driver (231854) seems to fix my ath problems.
 > > Does that make sense to you?
 > 
 > Nope. That just started shifting around locks. Can you please try
 > 231852 with the debugging patch I threw you (that patched
 > ieee80211_scan.c) and see if it complains?
 
 Sure, I'll try 231852 + your patch.
 
 > If that patch fixed anything, it just delayed things enough to hide
 > what's going on...
 
 I see. Hiding a problem is not equal to fixing it. :-)
 
 
 -- 
 Joel