I tried to configure openSUSE 11.1 Linux into Acer Aspire 4530 laptop. Althought the ath9k was detected and installed successfully the openSUSE but performance/stability seem like not so great. It will hang when using aireplay-ng. I have to update it with the latest atheros driver.
The chipset is what determines which driver you need, not the manufacturer of the card. Here are a number of ways to find out. All the commands should be run as root.