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diff --git a/recipes/wlan-ng/files/post-down b/recipes/wlan-ng/files/post-down
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+#!/bin/sh
+#
+# This script takes care of bringing down wlan-ng devices.
+# It is run by ifdown.
+
+WLANCTL=/sbin/wlanctl-ng
+
+if [ ! -x $WLANCTL ] ; then
+ exit 0
+fi
+
+case $IFACE in
+wlan?)
+ # Reset device to make sure it is not trying to generate
+ # interrupts.
+ result=`$WLANCTL $IFACE lnxreq_ifstate ifstate=disable`
+
+ # Remove modules. Of course, for all I know they are still in use
+ # by another interface, in which case these rmmods will fail. Also,
+ # depending on how modutils is set up, different prism2 modules
+ # might be loaded.
+ (
+ rmmod prism2_pci || rmmod prism2_cs || rmmod prism2_usb || \
+ rmmod prism2_plx || true
+ rmmod p80211 || true
+ ) 2>/dev/null
+
+ # Remove lock file, just in case.
+ rm -f /var/lock/wlan-$IFACE.lock
+;;
+esac