iwl3945 in 2.6.24-rc1 dies under load

[Pavel Machek <pavel@ucw.cz>]

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!).

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.

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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