linux-kernel - Re: ath5k regression associating with APs in 2.6.38

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Message-ID: <BANLkTimEmBRyxbZgffJMrH4TTc4f6peuTg@mail.gmail.com>
Date:	Wed, 4 May 2011 23:09:03 +0300
From:	Nick Kossifidis <mickflemm@...il.com>
To:	"John W. Linville" <linville@...driver.com>,
	Jiri Slaby <jirislaby@...il.com>,
	Nick Kossifidis <mickflemm@...il.com>,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>,
	Bob Copeland <me@...copeland.com>,
	linux-wireless@...r.kernel.org, ath5k-devel@...ema.h4ckr.net,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: ath5k regression associating with APs in 2.6.38

2011/5/4 Seth Forshee <seth.forshee@...onical.com>:
> On Wed, May 04, 2011 at 01:27:17PM -0400, John W. Linville wrote:
>> On Wed, May 04, 2011 at 10:38:19AM -0500, Seth Forshee wrote:
>> > I've been investigating some reports of a regression in associating with
>> > APs with AR2413 in 2.6.38. Association repeatedly fails with some
>> > "direct probe to x timed out" messages (see syslog excerpt below),
>> > although it will generally associate eventually, after many tries.
>> >
>> > Bisection identifies 8aec7af (ath5k: Support synth-only channel change
>> > for AR2413/AR5413) as offending commit. Prior to this commit there are
>> > no direct probe messages at all in the logs. I've also found that
>> > forcing fast to false at the top of ath5k_hw_reset() fixes the issue.
>> > I'm not sure what the connection is between this commit and the
>> > timeouts. Any suggestions?
>>
>> Have you tried reverting that commit on top of 2.6.38?  Can you
>> recreate the issue with 2.6.39-rc6 (or later)?
>
> I started to revert that commit, but it wasn't straight-forward due to
> later changes. Forcing fast to false in ath5k_hw_reset() acts as a
> functional revert of sorts since that should force it back to a full
> reset for all channel changes, and it's much simpler than working out
> the right way to revert the commit. I think the results suggest strongly
> that a revert is likely to fix the problem. I can finish the work to
> revert if you'd still like to see the results.
>
> Testing a previous .39-rc kernel still exhibited the failure. I don't
> recall which one it was and apparently forgot to make note of it. I'll
> request testing against rc6.
>
> Thanks,
> Seth
>

Do you get scan results ?
Can you enable ATH5K_DEBUG_RESET and see what you get ?

-- 
GPG ID: 0xD21DB2DB
As you read this post global entropy rises. Have Fun ;-)
Nick
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