linux-kernel - Re: [.32-rc1/2] ath5k: has become unreliable with .32-rc1

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Date:	Thu, 1 Oct 2009 00:27:37 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Frans Pop <elendil@...net.nl>
Cc:	Bob Copeland <me@...copeland.com>, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [.32-rc1/2] ath5k: has become unreliable with .32-rc1

On Wednesday 30 September 2009, Frans Pop wrote:
> On Wednesday 30 September 2009, Bob Copeland wrote:
> > On Wed, Sep 30, 2009 at 09:52:27AM +0200, Frans Pop wrote:
> > > This is on a laptop I don't use much, but with .31 wireless has always
> > > been (and still is) reliable (.31-rc5 is the last kernel I built for
> > > it). On my other laptop wireless (iwlagn) works fine with .32-rc1.
> >
> > Although iwlagn works, I would think this kind of thing:
> > > ath0: authenticated
> > > ath0: associate with AP 00:14:c1:38:e5:15 (try 1)
> > > ath0: RX ReassocResp from 00:14:c1:38:e5:15 (capab=0x411 status=0 aid=2)
> > > ath0: associated 
> > > ath0: deauthenticating by local choice (reason=3)
> >
> > ...is some kind of issue with userspace or wext rather than the driver.
> > Ath5k only had a dozen or so patches this time around, so it should be
> > easy to bisect if it's a problem in the driver.  One possibility is
> > hardware CCMP support but I've been using it here for some time.
> 
> I doubt it's a userspace issue, but it does look like the regression was
> not triggered by the ath5k driver itself. In the mean time I did a bisect
> on the drivers/net/wireless/ath directory without any results.
> 
> > By the way, name it what you will, but the standard is wlan0 these days
> > :)
> 
> Yep. A leftover from the days I used madwifi :-) I kind of like it though
> given its similarity to eth0.
> 
> > > So the difference looks to be how I boot: if I do a *cold* boot
> > > directly into .32, wireless fails; if I *reboot* from .31 into .32,
> > > wireless comes up correctly. Reboot from .32 to .32 fails too.
> >
> > Is that repeatable?
> 
> Yes, 100%. Weird heh? That's what made me think it must be an ath5k
> driver issue as it looks like a hardware initialization problem. Could
> be PCI or PCMCIA though, although I don't see anything suspicious in
> dmesg.
> 
> > Rafael J. Wysocki has a patch floating around to fix PCMCIA resume,
> > linked here: http://bugzilla.kernel.org/show_bug.cgi?id=13092

Already in the Linus' tree.

Thanks,
Rafael
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