Fix race condition in deconz (#91328)

* Fix race condition in deconz

* Use a new separate test

homeassistant/components/deconz/gateway.py

@@ -235,9 +235,15 @@ class DeconzGateway:
     ) -> None:
         """Handle signals of config entry being updated.
 
-        This is a static method because a class method (bound method), cannot be used with weak references.
-        Causes for this is either discovery updating host address or config entry options changing.
+        This is a static method because a class method (bound method),
+        cannot be used with weak references.
+        Causes for this is either discovery updating host address or
+        config entry options changing.
         """
+        if entry.entry_id not in hass.data[DECONZ_DOMAIN]:
+            # A race condition can occur if multiple config entries are
+            # unloaded in parallel
+            return
         gateway = get_gateway_from_config_entry(hass, entry)
 
         if gateway.api.host != gateway.host:

tests/components/deconz/test_init.py

@@ -1,4 +1,5 @@
 """Test deCONZ component setup process."""
+import asyncio
 from unittest.mock import patch
 
 from homeassistant.components.deconz import (
@@ -133,6 +134,31 @@ async def test_unload_entry_multiple_gateways(
     assert hass.data[DECONZ_DOMAIN][config_entry2.entry_id].master
 
 
+async def test_unload_entry_multiple_gateways_parallel(
+    hass: HomeAssistant, aioclient_mock: AiohttpClientMocker
+) -> None:
+    """Test race condition when unloading multiple config entries in parallel."""
+    config_entry = await setup_deconz_integration(hass, aioclient_mock)
+    aioclient_mock.clear_requests()
+
+    data = {"config": {"bridgeid": "01234E56789B"}}
+    with patch.dict(DECONZ_WEB_REQUEST, data):
+        config_entry2 = await setup_deconz_integration(
+            hass,
+            aioclient_mock,
+            entry_id="2",
+            unique_id="01234E56789B",
+        )
+
+    assert len(hass.data[DECONZ_DOMAIN]) == 2
+
+    await asyncio.gather(
+        config_entry.async_unload(hass), config_entry2.async_unload(hass)
+    )
+
+    assert len(hass.data[DECONZ_DOMAIN]) == 0
+
+
 async def test_update_group_unique_id(hass: HomeAssistant) -> None:
     """Test successful migration of entry data."""
     old_unique_id = "123"