When starting, hostapd resets the wireless interface, clearing its address. What is the least perversive way of reconfiguring the interface after hostapd has started? I can think of another service dependant on hostapd, maybe that's the true way?

In fact it reeks of XY-problem, first of all I cannot understand why it needs to reset the interface:

nl80211: interface wlan0 in phy phy0
nl80211: Set mode ifindex 4 iftype 3 (AP)
nl80211: Failed to set interface 4 to mode 3: -16 (Device or resource busy)
nl80211: Try mode change after setting interface down
nl80211: Set mode ifindex 4 iftype 3 (AP)
nl80211: Mode change succeeded while interface is down
nl80211: Setup AP(wlan0) - device_ap_sme=0 use_monitor=0

Maybe that's because it's a USB device, or maybe because of the driver (rt2800usb)…

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