net: ieee802154: return -EINVAL for unknown addr type

This patch adds handling to return -EINVAL for an unknown addr type. The
current behaviour is to return 0 as successful but the size of an
unknown addr type is not defined and should return an error like -EINVAL.

Fixes: 94160108 ("net/ieee802154: fix uninit value bug in dgram_sendmsg")
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ieee802154_netdev.h

@@ -185,21 +185,27 @@ static inline int
 ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 *daddr, int len)
 {
 	struct ieee802154_addr_sa *sa;
+	int ret = 0;
 
 	sa = &daddr->addr;
 	if (len < IEEE802154_MIN_NAMELEN)
 		return -EINVAL;
 	switch (sa->addr_type) {
+	case IEEE802154_ADDR_NONE:
+		break;
 	case IEEE802154_ADDR_SHORT:
 		if (len < IEEE802154_NAMELEN_SHORT)
-			return -EINVAL;
+			ret = -EINVAL;
 		break;
 	case IEEE802154_ADDR_LONG:
 		if (len < IEEE802154_NAMELEN_LONG)
-			return -EINVAL;
+			ret = -EINVAL;
+		break;
+	default:
+		ret = -EINVAL;
 		break;
 	}
-	return 0;
+	return ret;
 }
 
 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,