AR9271
Atheros 9271 chipset is present in a few Wi-Fi adapters such as Unex_DNUA-93F WiFi USB adapters
Docs
DNUA-93F
TPE-N150USB
SW
apt-get install firmware-atheros
usb 2-1.4: new high-speed USB device number 98 using ehci_hcd usb 2-1.4: New USB device found, idVendor=0cf3, idProduct=9271 usb 2-1.4: New USB device strings: Mfr=16, Product=32, SerialNumber=48 usb 2-1.4: Product: UB93 usb 2-1.4: Manufacturer: ATHEROS usb 2-1.4: SerialNumber: 12345 usb 2-1.4: firmware: agent loaded htc_9271.fw into memory usb 2-1.4: ath9k_htc: Transferred FW: htc_9271.fw, size: 51272 ath9k_htc 2-1.4:1.0: ath9k_htc: HTC initialized with 33 credits ath9k_htc 2-1.4:1.0: ath9k_htc: FW Version: 1.3 ath: EEPROM regdomain: 0x65 ath: EEPROM indicates we should expect a direct regpair map ath: Country alpha2 being used: 00 ath: Regpair used: 0x65 ieee80211 phy2: Atheros AR9271 Rev:1 Registered led device: ath9k_htc-phy2 usb 2-1.4: ath9k_htc: USB layer initialized