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-rw-r--r--synapse/storage/databases/main/receipts.py11
1 files changed, 1 insertions, 10 deletions
diff --git a/synapse/storage/databases/main/receipts.py b/synapse/storage/databases/main/receipts.py
index 5cdf16521c..ca7917c989 100644
--- a/synapse/storage/databases/main/receipts.py
+++ b/synapse/storage/databases/main/receipts.py
@@ -25,7 +25,6 @@ from synapse.storage.database import DatabasePool
 from synapse.storage.util.id_generators import StreamIdGenerator
 from synapse.types import JsonDict
 from synapse.util import json_encoder
-from synapse.util.async_helpers import ObservableDeferred
 from synapse.util.caches.descriptors import cached, cachedList
 from synapse.util.caches.stream_change_cache import StreamChangeCache
 
@@ -413,18 +412,10 @@ class ReceiptsWorkerStore(SQLBaseStore, metaclass=abc.ABCMeta):
         if receipt_type != "m.read":
             return
 
-        # Returns either an ObservableDeferred or the raw result
-        res = self.get_users_with_read_receipts_in_room.cache.get(
+        res = self.get_users_with_read_receipts_in_room.cache.get_immediate(
             room_id, None, update_metrics=False
         )
 
-        # first handle the ObservableDeferred case
-        if isinstance(res, ObservableDeferred):
-            if res.has_called():
-                res = res.get_result()
-            else:
-                res = None
-
         if res and user_id in res:
             # We'd only be adding to the set, so no point invalidating if the
             # user is already there