Re: [PATCH] iwlwifi: do not nulify ctx->vif on reset

[Stanislaw Gruszka <sgruszka@redhat.com>]

On Wed, Mar 14, 2012 at 08:07:48AM +0100, Stanislaw Gruszka wrote:
> I'll update and recheck again.

On updated tree (head 035364916f75151b4b91ea53968c6beba7545317) devices
stop working here on any forced reset during TX as well. There are
messages like below in dmesg:

wlan3: dropped data frame to not associated station 00:00:00:00:00:00

And one time crash happened too, in:

(gdb) l *(iwl_remove_dynamic_key+0x1f0)
0x15e20 is in iwl_remove_dynamic_key (drivers/net/wireless/iwlwifi/iwl-agn-sta.c:1105).
1100		/*
1101		 * The device expects GTKs for station interfaces to be
1102		 * installed as GTKs for the AP station. If we have no
1103		 * station ID, then use the ap_sta_id in that case.
1104		 */
1105		if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1106			return vif_priv->ctx->ap_sta_id;
1107	
1108		return IWL_INVALID_STATION;
1109	}

To reproduce problems, I'm doing "ping -f 192.168.1.1" on one console
and run script [1] on other console.

Stanislaw

[1]

#!/bin/bash

mount -t debugfs debugfs /sys/kernel/debug
cd /sys/kernel/debug/ieee80211

while true; do 

sleep 20
for i in `ls -X ` ; do echo 1 > $i/iwlwifi/debug/force_reset ; done

done