cfg80211: re-join IBSS when privacy changes

When going from/to a WEP protected IBSS, we need to
leave this one and join a new one to take care of
the changed capability.

Cc: Hong Zhang <henryzhang62@yahoo.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 39b6d92..34dfc93 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -169,8 +169,8 @@
 	wdev_unlock(wdev);
 }
 
-static int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
-				 struct net_device *dev, bool nowext)
+int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
+			  struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;