linux-kernel - Re: iwl3945 in 2.6.24-rc1 dies under load

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Date:	Thu, 1 Nov 2007 02:59:04 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	linux-wireless@...r.kernel.org,
	kernel list <linux-kernel@...r.kernel.org>,
	ipw3945-devel@...ts.sourceforge.net, yi.zhu@...el.com
Subject: Re: iwl3945 in 2.6.24-rc1 dies under load

On Wednesday, 31 October 2007 01:52, Pavel Machek wrote:
> 
> Hi!
> 
> ...does not seem to work too well :-(. It connects with the AP
> (good!), and survives some "normal" use, but it died at first big
> tcpspray (baaaad!).

Is this a regression from 2.6.23?

> Oct 31 01:03:57 amd log1n[1411]: ROOT LOGIN on `tty6'
> Oct 31 01:05:06 amd kernel: iwl3945: Intel(R) PRO/Wireless 3945ABG/BG
> Network Connection driver for Linux, 1.1.17kds
> Oct 31 01:05:06 amd kernel: iwl3945: Copyright(c) 2003-2007 Intel
> Corporation
> Oct 31 01:05:06 amd kernel: PCI: Setting latency timer of device
> 0000:03:00.0 to 64
> Oct 31 01:05:06 amd kernel: iwl3945: Detected Intel PRO/Wireless
> 3945ABG Network Connection
> Oct 31 01:05:07 amd kernel: iwl3945: Tunable channels: 11 802.11bg, 13
> 802.11a channels
> Oct 31 01:05:07 amd kernel: phy4: Selected rate control algorithm
> 'simple'
> Oct 31 01:06:05 amd kernel: wlan0: Initial auth_alg=0
> Oct 31 01:06:05 amd kernel: wlan0: authenticate with AP
> 00:11:2f:0e:95:a0
> Oct 31 01:06:05 amd kernel: wlan0: RX authentication from
> 00:11:2f:0e:95:a0 (alg=0 transaction=2 status=0)
> Oct 31 01:06:05 amd kernel: wlan0: authenticated
> Oct 31 01:06:05 amd kernel: wlan0: associate with AP 00:11:2f:0e:95:a0
> Oct 31 01:06:05 amd kernel: wlan0: RX AssocResp from 00:11:2f:0e:95:a0
> (capab=0x401 status=0 aid=1)
> Oct 31 01:06:05 amd kernel: wlan0: associated
> Oct 31 01:06:05 amd kernel: wlan0: switched to short barker preamble
> (BSSID=00:11:2f:0e:95:a0)
> Oct 31 01:06:05 amd kernel: iwl3945: iwl-3945-rs not selected as rate
> control algo!
> Oct 31 01:23:52 amd kernel: wlan0: RX deauthentication from
> 00:11:2f:0e:95:a0 (reason=4)
> Oct 31 01:23:52 amd kernel: wlan0: deauthenticated
> Oct 31 01:23:53 amd kernel: wlan0: authenticate with AP
> 00:11:2f:0e:95:a0
> Oct 31 01:23:53 amd kernel: wlan0: RX authentication from
> 00:11:2f:0e:95:a0 (alg=0 transaction=2 status=0)
> Oct 31 01:23:53 amd kernel: wlan0: authenticated
> Oct 31 01:23:53 amd kernel: wlan0: associate with AP 00:11:2f:0e:95:a0
> Oct 31 01:23:53 amd kernel: wlan0: RX ReassocResp from
> 00:11:2f:0e:95:a0 (capab=0x401 status=0 aid=1)
> Oct 31 01:23:53 amd kernel: wlan0: associated
> Oct 31 01:23:53 amd kernel: wlan0: switched to short barker preamble
> (BSSID=00:11:2f:0e:95:a0)
> Oct 31 01:23:53 amd kernel: iwl3945: iwl-3945-rs not selected as rate
> control algo!
> Oct 31 01:23:53 amd kernel: wlan0: CTS protection enabled
> (BSSID=00:11:2f:0e:95:a0)
> Oct 31 01:23:53 amd kernel: wlan0: switched to long barker preamble
> (BSSID=00:11:2f:0e:95:a0)
> Oct 31 01:35:44 amd -- MARK --
> Oct 31 01:38:16 amd kernel: iwl3945: Microcode SW error detected.
> Restarting 0x82000008.
> Oct 31 01:38:16 amd kernel: iwl3945: Error Reply type 0x00000005 cmd
> REPLY_TX (0x1C) seq 0x0267 ser 0x0000004B
> Oct 31 01:38:18 amd kernel: iwl3945: Can't stop Rx DMA.
> 
> ...unfortunately, microcode sources are not available so Intel should
> fix this, right?
> 
> (Actually, it recovered after 3 minutes):
> 
> Oct 31 01:41:15 amd kernel: wlan0: RX deauthentication from
> 00:11:2f:0e:95:a0 (reason=4)
> Oct 31 01:41:15 amd kernel: wlan0: deauthenticated
> Oct 31 01:41:16 amd kernel: wlan0: authenticate with AP
> 00:11:2f:0e:95:a0
> Oct 31 01:41:16 amd kernel: wlan0: RX authentication from
> 00:11:2f:0e:95:a0 (alg=0 transaction=2 status=0)
> Oct 31 01:41:16 amd kernel: wlan0: authenticated
> Oct 31 01:41:16 amd kernel: wlan0: associate with AP 00:11:2f:0e:95:a0
> Oct 31 01:41:16 amd kernel: wlan0: RX ReassocResp from
> 00:11:2f:0e:95:a0 (capab=0x401 status=0 aid=1)
> Oct 31 01:41:16 amd kernel: wlan0: associated
> Oct 31 01:41:16 amd kernel: wlan0: CTS protection enabled
> (BSSID=00:11:2f:0e:95:a0)
> Oct 31 01:41:16 amd kernel: iwl3945: iwl-3945-rs not selected as rate
> control algo!
> Oct 31 01:41:16 amd kernel: wlan0: switched to short barker preamble
> (BSSID=00:11:2f:0e:95:a0)
> 
> Hmm, and it is pretty reproducible, with:
> 
> tcpspray -n 1 -b 10000000 10.0.0.2
> 
> Oct 31 01:42:56 amd kernel: iwl3945: Microcode SW error detected.
> Restarting 0x82000008.
> Oct 31 01:42:56 amd kernel: iwl3945: Error Reply type 0x00000005 cmd
> REPLY_TX (0x1C) seq 0x02C7 ser 0x0000004B
> Oct 31 01:42:58 amd kernel: iwl3945: Can't stop Rx DMA.
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