SCAN and RUN can't happen at the same time

I think my problem is similar to ticket #287 and ticket #894 with respect to error

ath_rate_sample: no rates for 00:02:6f:43:98:ec?

Except

SCAN and RUN can't happen at the same time
kernel BUG at ieee80211_proto.c:1601!

Seeing the same issue when 2 VAPs are used, one in client mode, the other in AP mode. any iwconfig change to either VAP after they are running results in this PANIC

This was after running for several minutes, and if no iwconfig changes are made, it will operate without issue for hours. However, a simple channel change causes the panic

# iwconfig ath2 channel 6 SCAN and RUN can't happen at the same time

---

kernel BUG at <bad filename>:60805! invalid operand: 0000 #1 PREEMPT Modules linked in: tun ipt_multiport ipt_mark cls_u32 sch_sfq sch_htb ipt_MARK iptable_filter iptable_mangle pcmcia yenta_socket rsrc_nonstatic pcmcia_core wlan_tkip wlan_xauth bridge wlan_scan_ap natsemi crc32 ath_pci ath_rate_sample wlan ath_hal wd1100 rfcomm l2cap bluetooth ipt_MASQUERADE iptable_nat ip_conntrack ip_tables CPU: 0 EIP: 0060:[<c88e6632>] Tainted: P VLI EFLAGS: 00010246 (2.6.11.7nomadisp) EIP is at ieee80211_newstate+0x8e/0x195 [wlan] eax: 0000002b ebx: 00000000 ecx: c49a9e38 edx: c88f3060

comBIOS ver. 1.28 20050529 Copyright (C) 2000-2005 Soekris Engineering.

net4801

0128 Mbyte Memory CPU Geode 266 Mhz

I just compile r2100 and found the same error. Then I decided to change the sequence of creating VAP in script.

I first create interface and enable it and then execute WDS script.

#!/bin/sh

wlanconfig ath0 destroy
wlanconfig ath0 create wlandev wifi0 wlanmode ap

ifconfig ath0 up

#iwpriv ath0 mode 1
iwconfig ath0 channel 1 mode master essid "test"
iwconfig ath0 txpower 400mW sens 3
iwpriv ath0 hide_ssid 1

/etc/init.d/WDS #<-----put here

Instead of creating all VAP first and then isssue ifconfig <VAP Interface> up command one by one, I create VAP one by one and issue ifconfig <VAP Interface> up immediately after creating VAP. Then create another VAP and so on. The WDS script is like this

!/bin/sh

cnt=1

processLine(){
  line="$@" # get all args
    echo $line
    echo ath$cnt
    wlanconfig ath$cnt destroy
    wlanconfig ath$cnt create wlandev wifi0 wlanmode wds
    iwpriv ath$cnt wds 1
    iwpriv ath$cnt wds_add $line
    iwpriv ath$cnt hide_ssid 1
    ifconfig ath$cnt up
    brctl addif br0 ath$cnt
    }

    ### Main script stars here ###
    # Store file name
    FILE="/etc/WDSLIST"

# make sure file exist and readable
    if [ ! -f $FILE ]; then
     echo "$FILE : does not exists"
     exit 1
    elif [ ! -r $FILE ]; then
     echo "$FILE: can not read"
     exit 2
    fi
# read $FILE using the file descriptors
    exec 3<&0
    exec 0<$FILE
    brctl stp br0 on
    while read line
    do
    # use $line variable to process line in processLine() function
      processLine $line
      cnt=`expr $cnt + 1`
    done

    exec 0<&3

exit 0

Now VAP are created one by one. If I create all VAP and then make then up one by one. It doesn't work. I read some where in ticket/userdoc that, you have to create VAPs first and issue ifconfig VAP up command in reverse order as I did in my previous script. Now make VAP one by one. I hope this will help many users.

State machine was rewritten in trunk. Should not occur now.