Re: console freeze after "ifconfig wlan0 scan" with wi(4) pccard device

On Sunday, January 09, 2011 23:22:28 Anton Shterenlikht wrote:
> On amd64 r217010 laptop (HP Compaq 6715s)
> I'm trying to use this wi(4) device:
> 
> wi0: <The Linksys Group, Inc. Instant Wireless Network PC Card>
>  at port 0x100-0x13f irq 20 function 0 config 1 on pccard0
> 
> I do
> 
> # ifconfig wlan0 create wlandev wi0
> # ifconfig -a
> bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        
> options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTAT
> E>
>         ether 00:1a:4b:89:4b:4e
>         inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255
>         media: Ethernet autoselect (100baseTX <full-duplex>)
>         status: active
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>         options=3<RXCSUM,TXCSUM>
>         inet 127.0.0.1 netmask 0xff000000
>         inet6 ::1 prefixlen 128
>         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x8
>         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> wi0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290
>         ether 00:06:25:10:56:3b
>         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
>         status: no carrier
> wlan0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         ether 00:06:25:10:56:3b
>         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
>         status: no carrier
>         ssid "" channel 1 (2412 MHz 11b)
>         country US authmode OPEN privacy OFF txpower 0 bmiss 7 scanvalid 60
>         bintval 0
> 
> But after
> 
> # ifconfig wlan0 up scan
> 
> I get console freeze requiring cold reboot.
> No panic, just a LOR:
> 
>  wi0: <The Linksys Group, Inc. Instant Wireless Network PC Card> at port
> 0x100-0x13f irq 20 function 0 config 1 on pccard0 wlan0: Ethernet address:
> 00:06:25:10:56:3b
>  lock order reversal:
>  1st 0xffffff80012be018 wi0_com_lock (wi0_com_lock) _at_
> /usr/src/sys/net80211/ieee80211_scan.c:806 2nd 0xfffffe0001b8d010 wi0
> (network driver) _at_ /usr/src/sys/dev/wi/if_wi.c:1083 KDB: stack backtrace:
> [..]

This is a known LOR, many wireless do have that. It happens right after a scan 
iteration if there is a network to connect to.

> In case it matters I've
> 
> hw.cbb.start_memory="0xf4800000"
> 
> in /boot/loader.conf, according to
> http://www.freebsd.org/cgi/query-pr.cgi?pr=115623

Do you by any change have another device you can test the pccard slot with? 

Also, you might want to try 'ifconfig wlan0 ssid 
somethingwhichdoesdefinitelynotexist up; ifconfig wlan0 list scan'
instead of 'ifconfig wlan0 up scan'.

-- 
Bernhard