Prevent new discovery flows from being created when stopping (#88743)

homeassistant/helpers/discovery_flow.py

@@ -44,7 +44,9 @@ def _async_init_flow(
     # as ones in progress as it may cause additional device probing
     # which can overload devices since zeroconf/ssdp updates can happen
     # multiple times in the same minute
-    if hass.config_entries.flow.async_has_matching_flow(domain, context, data):
+    if hass.is_stopping or hass.config_entries.flow.async_has_matching_flow(
+        domain, context, data
+    ):
         return None
 
     return hass.config_entries.flow.async_init(domain, context=context, data=data)

tests/helpers/test_discovery_flow.py

@@ -96,3 +96,20 @@ async def test_async_create_flow_checks_existing_flows_before_startup(
             data={"properties": {"id": "aa:bb:cc:dd:ee:ff"}},
         )
     ]
+
+
+async def test_async_create_flow_does_nothing_after_stop(
+    hass: HomeAssistant, mock_flow_init
+) -> None:
+    """Test we no longer create flows when hass is stopping."""
+    hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
+    await hass.async_block_till_done()
+    hass.state = CoreState.stopping
+    mock_flow_init.reset_mock()
+    discovery_flow.async_create_flow(
+        hass,
+        "hue",
+        {"source": config_entries.SOURCE_HOMEKIT},
+        {"properties": {"id": "aa:bb:cc:dd:ee:ff"}},
+    )
+    assert len(mock_flow_init.mock_calls) == 0