Bluetooth: Update sec_level/auth_type for already existing connections

Update auth level for already existing connections if it is lower
than required by new connection.

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Reviewed-by: Emeltchenko Andrei <andrei.emeltchenko@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index b10e3cd..800b6b9 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -358,6 +358,11 @@
 		acl->sec_level = sec_level;
 		acl->auth_type = auth_type;
 		hci_acl_connect(acl);
+	} else {
+		if (acl->sec_level < sec_level)
+			acl->sec_level = sec_level;
+		if (acl->auth_type < auth_type)
+			acl->auth_type = auth_type;
 	}
 
 	if (type == ACL_LINK)