linux-kernel - Re: [Bug #14267] Disassociating atheros wlan

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Message-Id: <20091122162131.0e2e60ef.kristoffer.ericson@gmail.com>
Date:	Sun, 22 Nov 2009 16:21:31 +0100
From:	Kristoffer Ericson <kristoffer.ericson@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Johannes Berg <johannes@...solutions.net>,
	"John W. Linville" <linville@...driver.com>,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>,
	"Justin P. Mattock" <justinmattock@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	linux-wireless@...r.kernel.org
Subject: Re: [Bug #14267] Disassociating atheros wlan

On Sun, 22 Nov 2009 15:19:54 +0100
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> On Sunday 22 November 2009, Johannes Berg wrote:
> > On Sat, 2009-11-21 at 09:38 -0800, Justin P. Mattock wrote:
> > 
> > > I did a bisect yesterday on this, and the results
> > > seemed to have worked over here by reverting:
> > > 
> > > 75e6c3b72b3ab01c47629f3fbd0fed4e6550bf3a
> > > cfg80211: lower dynamic PS timeout to 100ms
> > > 
> > > if Kristoffer can try reverting this one
> > > to see, then we can go from there.
> > 
> > So that just means the driver is broken. Please run
> > 
> > 	iwconfig wlan0 power off
> > 
> > to fix it then. And the patch below will disable it by default since
> > it's broken.
> > 
> > johannes
> > 
> > --- wireless-testing.orig/drivers/net/wireless/ath/ath9k/main.c	2009-11-22 11:44:41.000000000 +0100
> > +++ wireless-testing/drivers/net/wireless/ath/ath9k/main.c	2009-11-22 11:45:26.000000000 +0100
> > @@ -1893,6 +1893,8 @@ void ath_set_hw_capab(struct ath_softc *
> >  		BIT(NL80211_IFTYPE_ADHOC) |
> >  		BIT(NL80211_IFTYPE_MESH_POINT);
> >  
> > +	hw->wiphy->ps_default = false;
> > +
> >  	hw->queues = 4;
> >  	hw->max_rates = 4;
> >  	hw->channel_change_time = 5000;
> 
> OK, so perhaps this patch should be applied until th ath9k driver is fixed?  Luis?  John?

I applied the patch from johannes and it ended my issues atleast. I ran my machine for approx
2 hours without seeing the disconnect issue (which I usually saw after 15-25min). Cant be 100% of course
but so far so good.

I agree with Justin that we could wait until he gets a chance to test it. It should be accepted
after initial merge (and stable trees) after that I think. Rafael thoughts?

Also, we should notify the atheros people so they could start fixing the driver (in a perfect world).

Best wishes
Kristoffer Ericson



-- 
Kristoffer Ericson <kristoffer.ericson@...il.com>
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