From cd892035dd1e2c9ba19f0045763151b3c21e7f95 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Sun, 11 Oct 2020 13:16:23 +0200
Subject: [PATCH] em tearoff check

---
 client/luascripts/lf_em_tearoff_protect.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/client/luascripts/lf_em_tearoff_protect.lua b/client/luascripts/lf_em_tearoff_protect.lua
index abf097ca9..4b78f3eaf 100644
--- a/client/luascripts/lf_em_tearoff_protect.lua
+++ b/client/luascripts/lf_em_tearoff_protect.lua
@@ -111,6 +111,10 @@ local function main(args)
     else
         rd_value = ('%08X'):format(word14)
     end
+    if rd_value == '00008000' then
+        print('Tag already fully unlocked, nothing to do')
+        return nil
+    end
     local wr_value = '00000000'
     n = n or 2
     sd = sd or 2000