hostapd prints errors like this: ioctl[SIOCS80211, op=20, val=0, arg_len=7]: No such file or directory

[Yuri]

I have an AP that is set up just like the handbook advises. Also the MAC 
address is changed.

Every time wireless client disassociates, hostapd prints the following 
messages:
wlan0: STA NN:NN:NN:NN:NN:NN IEEE 802.11: disassociated
AP-STA-DISCONNECTED NN:NN:NN:NN:NN:NN
ioctl[SIOCS80211, op=20, val=0, arg_len=7]: No such file or directory
ioctl[SIOCS80211, op=20, val=0, arg_len=7]: No such file or directory
ioctl[SIOCS80211, op=21, val=0, arg_len=42]: No such file or directory

Also in case of the wrong password supplied by client, hostapd is also 
printing this:
ioctl[SIOCS80211, op=20, val=0, arg_len=7]: No such file or directory
ioctl[SIOCS80211, op=21, val=0, arg_len=42]: No such file or directory
wlan0: STA NN:NN:NN:NN:NN:NN IEEE 802.11: deauthenticated due to local 
deauth request
wlan0: STA NN:NN:NN:NN:NN:NN IEEE 802.11: disassociated

op=20 is IEEE80211_IOC_DELKEY, and op=21 is IEEE80211_IOC_MLME.

Something is a bit broken because it prints these messages.

9.2-STABLE

Yuri