iwconfig for ath9k_htc device: "no wireless extension"

[Goshanecr]

Good day!

My system:
uname -a

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Linux VAIO-BOOK 4.6.0-gentoo #6 Fri Jul 8 00:41:59 MSK 2016 i686 Intel(R) Pentium(R) M processor 1.60GHz GenuineIntel GNU/Linux

I have a USB WiFi dongle based on Atheros 7015 chipset. I'm enable as module ath_9k:
grep ATH /usr/src/linux/.config

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# CONFIG_NET_VENDOR_ATHEROS is not set
CONFIG_ATH_COMMON=m
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K is not set
# CONFIG_ATH5K_PCI is not set
CONFIG_ATH9K_HW=m
CONFIG_ATH9K_COMMON=m
CONFIG_ATH9K_BTCOEX_SUPPORT=y
# CONFIG_ATH9K is not set
CONFIG_ATH9K_HTC=m
# CONFIG_ATH9K_HTC_DEBUGFS is not set
# CONFIG_ATH6KL is not set
# CONFIG_ATH10K is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set

Also I install linux-firmware. When I plug in dongle, appears that info:

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[  439.385569] usb 1-3: USB disconnect, device number 2
[  439.396955] usb 1-3: ath9k_htc: USB layer deinitialized
[  441.410052] usb 1-3: new high-speed USB device number 3 using ehci-pci
[  441.560978] usb 1-3: New USB device found, idVendor=0cf3, idProduct=7015
[  441.560991] usb 1-3: New USB device strings: Mfr=16, Product=32, SerialNumber=48
[  441.561000] usb 1-3: Product: USB WLAN
[  441.561009] usb 1-3: Manufacturer: ATHEROS
[  441.561017] usb 1-3: SerialNumber: 12345
[  441.563186] usb 1-3: ath9k_htc: Firmware ath9k_htc/htc_7010-1.4.0.fw requested
[  441.673476] usb 1-3: ath9k_htc: Transferred FW: ath9k_htc/htc_7010-1.4.0.fw, size: 72812
[  441.743953] ath9k_htc 1-3:1.0: ath9k_htc: HTC initialized with 45 credits
[  441.973544] ath9k_htc 1-3:1.0: ath9k_htc: FW Version: 1.4
[  441.973553] ath9k_htc 1-3:1.0: FW RMW support: On
[  441.973559] ath: EEPROM regdomain: 0x809c
[  441.973564] ath: EEPROM indicates we should expect a country code
[  441.973569] ath: doing EEPROM country->regdmn map search
[  441.973573] ath: country maps to regdmn code: 0x52
[  441.973578] ath: Country alpha2 being used: CN
[  441.973582] ath: Regpair used: 0x52
[  441.982239] ieee80211 phy1: Atheros AR9287 Rev:2
[  441.988286] ath9k_htc 1-3:1.0 wlp0s29f7u3: renamed from wlan0

None errors, but iwconfig gets:

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wlp0s29f7u3  no wireless extensions

What's wrong with my config?

[szatox]

What's wrong with my config?

Nothing. Wireless extensions is a legacy interface and iwconfig is a legacy tool.
You can enable it, I think it's CONFIG_CFG80211_WEXT, however it's deprecated. There are new, shiny things like iw (which offers a really, really, really horrible syntax) and wpa_cli which requires a wpa_supplicant daemon to be running.