Garrett Holmstrom wrote:
ath9k is included in 5.5's kernel. If you're feeling adventurous you
can grab the sources for the beta and compile them yourself. Or you can
wait a while for SL 5.5's release.
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.5.b1/html/Release_Notes/#id3488732
You don't need to compile them yourself, Red Hat testing kernel binaries
are available here:
http://people.redhat.com/jwilson/el5/
Kernel -186.el5 shipped as part of RHEL5.5b1.
Alternatively, as Alan Bartlett stated, grab the drivers from ELRepo.
Hope that helps.