mac80211: use the original mac address for the first virtual interface

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36408 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/files/lib/wifi/mac80211.sh

@@ -282,7 +282,9 @@ mac80211_generate_mac() {
 
 	local oIFS="$IFS"; IFS=":"; set -- $ref; IFS="$oIFS"
 	[ "$((0x$mask1))" -gt 0 ] && {
-		b1=$(((0x$1 | 0x2) ^ ($id << 2)))
+		b1="0x$1"
+		[ "$id" -gt 0 ] && \
+			b1=$((($b1 | 0x2) ^ (($id - 1) << 2)))
 		printf "%02x:%s:%s:%s:%s:%s" $b1 $2 $3 $4 $5 $6
 		return
 	}