From d01362dbaa352efccf4d64a5e0404b2d43060cd5 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Tue, 11 Jun 2024 21:12:46 +0200
Subject: unattended-lte-firmware-upgrade: check on valid version first

---
 unattended-lte-firmware-upgrade.rsc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/unattended-lte-firmware-upgrade.rsc b/unattended-lte-firmware-upgrade.rsc
index a8182e5..7ce4028 100644
--- a/unattended-lte-firmware-upgrade.rsc
+++ b/unattended-lte-firmware-upgrade.rsc
@@ -29,7 +29,8 @@
           :log info ("LTE firmware upgrade on '" . $1 . "' finished, waiting for reset.");
           :delay 240s;
           :local Firmware [ /interface/lte/firmware-upgrade $1 as-value ];
-          :if (($Firmware->"installed") != ($Firmware->"latest")) do={
+          :if ([ :len ($Firmware->"latest") ] > 0 && \
+               ($Firmware->"installed") != ($Firmware->"latest")) do={
             :log warning ("LTE firmware versions still differ. Upgrade failed anyway?");
           }
         } on-error={
-- 
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