Using ath9k on RHEL5
John Linville recently announced RHEL 5.5 will get a wireless facelift. The facelift consists of getting a new mac80211, cfg80211 and some wireless drivers backported from 2.6.32 down to 2.6.18. Along with it came ath9k. This section documents how to get the kernels to get ath9k on your Centos5/RHEL5 kernels and tries to track any issues present on them.
Go grab the kernels here:
If you do not have RHEL 5.4 you can try Centos 5.4.
bug 543719 - ath9k associates but gets nor DHCP replies on AR9280