Bluetooth: Fix connection key type updating for buggy controllers

If a controller generates a changed combination key as its first key the
connection key type will not be correctly set. In these situations make
sure the update the connection key type when such a buggy controller is
detected.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/hci_core.c

@@ -1083,8 +1083,11 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
 	 * previous key */
 	if (type == HCI_LK_CHANGED_COMBINATION &&
 					(!conn || conn->remote_auth == 0xff) &&
-					old_key_type == 0xff)
+					old_key_type == 0xff) {
 		type = HCI_LK_COMBINATION;
+		if (conn)
+			conn->key_type = type;
+	}
 
 	if (new_key && !hci_persistent_key(hdev, conn, type, old_key_type)) {
 		list_del(&key->list);