From d7be3c87801b83148e9f8d60da2e5dde11a83928 Mon Sep 17 00:00:00 2001
From: Michael <35783820+mib1185@users.noreply.github.com>
Date: Mon, 3 Oct 2022 03:19:37 +0200
Subject: [PATCH] Set Synology DSM update entity to unavailable in case no data
 from api gathered (#79508)

---
 homeassistant/components/synology_dsm/update.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/homeassistant/components/synology_dsm/update.py b/homeassistant/components/synology_dsm/update.py
index d3f3cc56eac..445e682651c 100644
--- a/homeassistant/components/synology_dsm/update.py
+++ b/homeassistant/components/synology_dsm/update.py
@@ -52,6 +52,11 @@ class SynoDSMUpdateEntity(SynologyDSMBaseEntity, UpdateEntity):
     entity_description: SynologyDSMUpdateEntityEntityDescription
     _attr_title = "Synology DSM"
 
+    @property
+    def available(self) -> bool:
+        """Return True if entity is available."""
+        return bool(self._api.upgrade)
+
     @property
     def installed_version(self) -> str | None:
         """Version installed and in use."""