title: how to identify in linux which driver is used by wifi usb device?
body: <p>I am running Ubuntu 12.04 with a TL-WN722N usb wifi module from tp-link. The wifi device is working fine. 
  I believe it is using the ath9k_htc driver but would like to be sure.<br>
  Is there a command to identify which driver is being used?
  I've tried lsusb, modinfo, and iwconfig but can't seem to see any driver info. </p>