mac80211: don't allow invalid WDS peer addresses

Rather than just disallowing the zero address, disallow all
invalid ones.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index e12ffa1..ab952ff 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -255,7 +255,7 @@
 
 	switch (sdata->vif.type) {
 	case IEEE80211_IF_TYPE_WDS:
-		if (is_zero_ether_addr(sdata->u.wds.remote_addr))
+		if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 			return -ENOLINK;
 
 		/* Create STA entry for the WDS peer */