From 3b88c6c0126c8b019322fecd9e8547cc2b6e8b60 Mon Sep 17 00:00:00 2001
From: Paulus Schoutsen <balloob@gmail.com>
Date: Mon, 16 May 2022 17:10:34 -0700
Subject: [PATCH] Inverse parallel updates default check, follow sync "update"
 method (#71720)

---
 homeassistant/helpers/entity_platform.py |  6 +++---
 tests/helpers/test_entity_platform.py    | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/homeassistant/helpers/entity_platform.py b/homeassistant/helpers/entity_platform.py
index 3d57a9c3dc0..ecf2125962a 100644
--- a/homeassistant/helpers/entity_platform.py
+++ b/homeassistant/helpers/entity_platform.py
@@ -120,7 +120,7 @@ class EntityPlatform:
 
     @callback
     def _get_parallel_updates_semaphore(
-        self, entity_has_async_update: bool
+        self, entity_has_sync_update: bool
     ) -> asyncio.Semaphore | None:
         """Get or create a semaphore for parallel updates.
 
@@ -138,7 +138,7 @@ class EntityPlatform:
 
         parallel_updates = getattr(self.platform, "PARALLEL_UPDATES", None)
 
-        if parallel_updates is None and not entity_has_async_update:
+        if parallel_updates is None and entity_has_sync_update:
             parallel_updates = 1
 
         if parallel_updates == 0:
@@ -422,7 +422,7 @@ class EntityPlatform:
         entity.add_to_platform_start(
             self.hass,
             self,
-            self._get_parallel_updates_semaphore(hasattr(entity, "async_update")),
+            self._get_parallel_updates_semaphore(hasattr(entity, "update")),
         )
 
         # Update properties before we generate the entity_id
diff --git a/tests/helpers/test_entity_platform.py b/tests/helpers/test_entity_platform.py
index 3f18d565e83..933669ebc53 100644
--- a/tests/helpers/test_entity_platform.py
+++ b/tests/helpers/test_entity_platform.py
@@ -332,6 +332,25 @@ async def test_parallel_updates_sync_platform(hass):
     assert entity.parallel_updates._value == 1
 
 
+async def test_parallel_updates_no_update_method(hass):
+    """Test platform parallel_updates default set to 0."""
+    platform = MockPlatform()
+
+    mock_entity_platform(hass, "test_domain.platform", platform)
+
+    component = EntityComponent(_LOGGER, DOMAIN, hass)
+    component._platforms = {}
+
+    await component.async_setup({DOMAIN: {"platform": "platform"}})
+    await hass.async_block_till_done()
+
+    handle = list(component._platforms.values())[-1]
+
+    entity = MockEntity()
+    await handle.async_add_entities([entity])
+    assert entity.parallel_updates is None
+
+
 async def test_parallel_updates_sync_platform_with_constant(hass):
     """Test sync platform can set parallel_updates limit."""
     platform = MockPlatform()