Hi,

If you get the wep key (or network name) wrong when configuring iwi 
network drivers the card becomes useless until you reboot. This is 
annoying when at a friends house and I mistype the key for example. I 
have tried taking the interface down and back up, it makes no difference.

Is there a way of resetting the card altogether?

thinky% ifconfig iwi0
iwi0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
         lladdr 00:12:f0:79:36:41
         groups: wlan
         media: IEEE802.11 autoselect
         status: no network
         ieee80211: nwid "" 100dBm
thinky% sudo ifconfig iwi0 nwid SquishMitten nwkey 
0xedd1edd2edd3edd4edd5edd666
thinky% sudo dhclient iwi0
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 9
DHCPOFFER from 192.168.1.254
DHCPREQUEST on iwi0 to 255.255.255.255 port 67
DHCPACK from 192.168.1.254
bound to 192.168.1.69 -- renewal in 43200 seconds.
thinky% ifconfig iwi0 

iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         lladdr 00:12:f0:79:36:41
         groups: wlan egress
         media: IEEE802.11 autoselect
         status: active
         ieee80211: nwid SquishMitten chan 1 bssid 00:11:95:54:90:97 
77dB nwkey <not displayed> 100dBm
         inet6 fe80::212:f0ff:fe79:3641%iwi0 prefixlen 64 scopeid 0x1
	inet 192.168.1.69 netmask 0xffffff00 broadcast 192.168.1.255
thinky% sudo ifconfig iwi0 nwid SquishMitten nwkey 
0xedd1edd2edd3edd4edd5edd667
thinky% sudo dhclient iwi0 

DHCPREQUEST on iwi0 to 255.255.255.255 port 67
DHCPREQUEST on iwi0 to 255.255.255.255 port 67
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 15
^C
thinky% ifconfig iwi0 

iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr 00:12:f0:79:36:41
	groups: wlan egress
	media: IEEE802.11 autoselect
	status: no network
	ieee80211: nwid SquishMitten nwkey <not displayed> 100dBm
	inet6 fe80::212:f0ff:fe79:3641%iwi0 prefixlen 64 scopeid 0x1
	inet 192.168.1.69 netmask 0xffffff00 broadcast 192.168.1.255
thinky% sudo ifconfig iwi0 nwid SquishMitten nwkey 
0xedd1edd2edd3edd4edd5edd666
thinky% sudo dhclient iwi0 

DHCPREQUEST on iwi0 to 255.255.255.255 port 67
DHCPREQUEST on iwi0 to 255.255.255.255 port 67
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on iwi0 to 255.255.255.255 port 67 interval 19
^C
thinky% ifconfig iwi0 

iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr 00:12:f0:79:36:41
	groups: wlan egress
	media: IEEE802.11 autoselect
	status: no network
	ieee80211: nwid SquishMitten nwkey <not displayed> 100dBm
	inet6 fe80::212:f0ff:fe79:3641%iwi0 prefixlen 64 scopeid 0x1
	inet 192.168.1.69 netmask 0xffffff00 broadcast 192.168.1.255

Thanks