http://thinkingsparrow.wordpress.com/2011/08/17/tplink-wn721n-can-not-use-when-fedora-updated-to-linux-kernel-3-0/
In the past few days, my computer installed Fedora 15 automally updated to Linux kernel 3.0, but when I use it. I can’t find my TPLink-WN721N wireless USB.
I use dmesg and find this:
[ 18.596309] ath9k_htc 1-3:1.0: ath9k_htc: Please upgrade to FW version 1.3
So I downloaded htc_9271.fw from
http://wireless.kernel.org/download/htc_fw/1.3/ and copy it to /lib/firmware.
And finally it works!