disabling/fixing "disabling multicast to unicast failed" errors ?

[PGNet Dev]

Hi,

On 03/29/2017 11:04 AM, michael-dev at fami-braun.de wrote:
 > multicast to unicast is a recent addition to the kernel. Your kernel 
refuses the setting with EBUSY, whereas ENOTSUPP would be expected if 
your kernel or driver does not implement this. There had been a patch 
draft around that errorneously reported EBUSY but that draft had not 
been accepted upstream.
 > So which kernel version and driver is this trace from?


It's:


	uname -rm
		4.10.6-3.g0402808-default x86_64


	hwinfo --netcard
		...
		29: USB 00.0: 0282 WLAN controller
		  ...
		  Model: "Ralink RT3572 Wireless Adapter"
		  Hotplug: USB
		  Vendor: usb 0x148f "Ralink Technology, Corp."
		  Device: usb 0x3572 "RT3572 Wireless Adapter"
		  Revision: "1.01"
		  Serial ID: "1.0"
		  Driver: "rt2800usb"
		  Driver Modules: "rt2800usb"
		...

	lsmod | grep 80211
		mac80211              835584  3 rt2800lib,rt2x00lib,rt2x00usb
		cfg80211              651264  2 rt2x00lib,mac80211
		rfkill                 28672  5 cfg80211

	grep driver etc/hostapd/hostapd.conf
		driver=nl80211