[Bug 193826] iwn does not scan channels

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193826

--- Comment #1 from Henry Hu <henry.hu.sh at gmail.com> ---
I just discovered that when wlan0 is connected and working normally, the empty
scan is also going on:

Dec 21 15:59:54 pepsi kernel: wlan0: ieee80211_scanreq: flags 0x20052 duration
0x7fffffff mindwell 0 maxdwell 0 nssid 1
Dec 21 15:59:54 pepsi kernel: wlan0: ieee80211_check_scan: active scan, append,
nojoin, once
Dec 21 15:59:54 pepsi kernel: wlan0: start_scan_locked: active scan, duration
2147483647 mindwell 0 maxdwell 0, desired mode 11ng, append, nojoin, once
Dec 21 15:59:54 pepsi kernel: wlan0: scan set  dwell min 20ms max 200ms
Dec 21 15:59:54 pepsi kernel: wlan0: scan_task: no channels to scan
Dec 21 15:59:54 pepsi kernel: wlan0: notify scan done

Even if I disabled bgscan, it's still running.

wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether c4:85:08:82:da:5c
        inet 192.168.1.110 netmask 0xffffff00 broadcast 192.168.1.255 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
        status: associated
        ssid henryhu channel 11 (2462 MHz 11g ht/20) bssid 10:fe:ed:50:0b:b8
        country US authmode WPA1+WPA2/802.11i privacy ON deftxkey UNDEF
        TKIP 2:128-bit TKIP 3:128-bit powersavemode CAM powersavesleep 100
        txpower 11 bmiss 10 scanvalid 60 protmode CTS ht20 ampdulimit 64k
        ampdudensity 8 -amsdutx amsdurx shortgi wme roaming MANUAL
        groups: wlan 

uname -a:
FreeBSD pepsi 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r275568M: Sat Dec  6
15:54:52 EST 2014     root at pepsi:/usr/obj/usr/src/sys/MYKERNEL  amd64

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