qMp (Quick Mesh Project) - Packages

Scenario: Alix2 with one mini-PCI DNMA-92 wireless card (802.11abgn AR9220).

iw list gives the following information:

root@qMp-ac50:/# iw list
Wiphy phy0
    Band 1:
        Capabilities: 0x11ce
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            TX STBC
            RX STBC 1-stream
            Max AMSDU length: 3839 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-15
        Frequencies:
            * 2412 MHz [1] (20.0 dBm)
[...]
    Band 2:
        Capabilities: 0x11ce
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            TX STBC
            RX STBC 1-stream
            Max AMSDU length: 3839 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-15
        Frequencies:
            * 5180 MHz [36] (16.0 dBm)
[...]

wifi detect gives the following conifguration:

root@qMp-ac50:/# wifi detect
config wifi-device  radio0
    option type     mac80211
    option channel  11
    option hwmode    11ng
    option path    'pci0000:00/0000:00:0c.0'
    option htmode    HT20
    list ht_capab    SHORT-GI-40
    list ht_capab    TX-STBC
    list ht_capab    RX-STBC1
    list ht_capab    DSSS_CCK-40
    # REMOVE THIS LINE TO ENABLE WIFI:
    option disabled 1

config wifi-iface
    option device   radio0
    option network  lan
    option mode     ap
    option ssid     OpenWrt
    option encryption none

However, the auto-configuration process adds the SHORT-GI-20 capability to the wireless card in /etc/config/wireless:

config wifi-device 'radio0'
        option type 'mac80211'
        option macaddr '90:a4:de:c0:bb:c1'
        option channel '1'
        option country 'SP'
        option hwmode '11ng'
        option htmode 'HT20'
        option txpower '17'
        option noscan '1'
        option distance '5000'
        list ht_capab 'SHORT-GI-20'
        list ht_capab 'SHORT-GI-40'
        list ht_capab 'RX-STBC1'
        list ht_capab 'DSSS_CCK-40'

config wifi-iface 'wlan0'
        option device 'radio0'
        option mode 'adhoc'
        option ssid 'qMp'
        option bssid '02:CA:FF:EE:BA:BE'
        option ifname 'wlan0'
        option network 'mesh_w0'

config wifi-iface 'wlan0ap'
        option device 'radio0'
        option mode 'ap'
        option ssid 'qMp-AP'
        option network 'lan'
        option encryption 'none'
        option ifname 'wlan0ap'

Then, when the wireless is reset with the wifi command, the following error appears:

root@qMp-ac50:/# wifi 
command failed: Device or resource busy (-16)
Configuration file: /var/run/hostapd-phy0.conf
wlan0ap: interface state UNINITIALIZED->COUNTRY_UPDATE
Driver does not support configured HT capability [SHORT-GI-20]
wlan0ap: Unable to setup interface.
hostapd_free_hapd_data: Interface wlan0ap wasn't started
Failed to start hostapd for phy0

The configuration script should be reviewed to ensure that only the supported features are enabled.