On boot:

ath0: <Atheros 5212> mem 0x88000000-0x8800ffff irq 17 at device 0.0 on cardbus0
ath0: unable to attach hardware; HAL status 3
device_attach: ath0 attach returned 6

kldunload if_ath_pci
kldload if_ath_pci

ath0: <Atheros 5212> mem 0x88000000-0x8800ffff irq 17 at device 0.0 on cardbus0
ath0: AR5212 mac 5.6 RF5112 phy 4.1

FreeBSD crashalot.rainbow-runner.nl 9.0-CURRENT FreeBSD 9.0-CURRENT #5 r223004M: Sun Jun 12 15:40:31 CEST 2011     root@crashalot.rainbow-runner.nl:/usr/obj/usr/src/sys/ASPERIN  i386