linux-kernel - Regression in 2.6.26-gitX: failure of wireless due to commit 175f9c1bba9b825d22b142

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Message-ID: <488AB2F4.7060806@lwfinger.net>
Date:	Sat, 26 Jul 2008 00:15:32 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Jussi Kivilinna <jussi.kivilinna@...et.fi>,
	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	barry bouwsma <free_beer_for_all@...oo.com>,
	wireless <linux-wireless@...r.kernel.org>
Subject: Regression in 2.6.26-gitX: failure of wireless due to commit 175f9c1bba9b825d22b142

Wireless communication has failed for recent 2.6.26-gitX kernels - a definite 
regression. The logs show sequences such as:

eth1: authenticate with AP 00:1a:70:46:ba:b1
eth1: authenticate with AP 00:1a:70:46:ba:b1
eth1: authenticated
eth1: associate with AP 00:1a:70:46:ba:b1
eth1: associate with AP 00:1a:70:46:ba:b1
eth1: associate with AP 00:1a:70:46:ba:b1
eth1: association with AP 00:1a:70:46:ba:b1 timed out

I have this problem with b43 and p54usb, and there is at least one report of the 
same problem with zd1211rw. In my case, the encryption method is WPA-PSK/TKIP. I 
have not tested with WEP or unencrypted networks.

Bisection yields the following:

175f9c1bba9b825d22b142d183c9e175488b260c is first bad commit
commit 175f9c1bba9b825d22b142d183c9e175488b260c
Author: Jussi Kivilinna <jussi.kivilinna@...et.fi>
Date:   Sun Jul 20 00:08:47 2008 -0700

     net_sched: Add size table for qdiscs

     Add size table functions for qdiscs and calculate packet size in
     qdisc_enqueue().

     Based on patch by Patrick McHardy
      http://marc.info/?l=linux-netdev&m=115201979221729&w=2

     Signed-off-by: Jussi Kivilinna <jussi.kivilinna@...et.fi>
     Signed-off-by: David S. Miller <davem@...emloft.net>

========================================================

I tried to reverse apply the patch; however, that does not happen cleanly, but I 
am confident that the problem arises here. I don't understand enough about this 
qdisc stuff to even guess at what might be wrong.

As always, I am willing to test any trial patches, etc.

Thanks,

Larry
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