Now you should be able to start wpa_supplicant and auth to your hotspot.
# wpa_supplicant -dd -D madwifi -i ath0 -c /etc/wpa_supplicant.conf
you should see something like this:
State: GROUP_HANDSHAKE -> COMPLETED CTRL-EVENT-CONNECTED - Connection to 00:14:a5:8d:34:94 completed (auth) EAPOL: External notification - portValid=1 EAPOL: External notification - EAP success=1 EAPOL: SUPP_PAE entering state AUTHENTICATING EAPOL: SUPP_BE entering state SUCCESS EAP: EAP entering state DISABLED EAPOL: SUPP_PAE entering state AUTHENTICATED EAPOL: SUPP_BE entering state IDLE
if everything works as expected, replace the -dd by -B to start wpa_supplicant in daemon mode.