diff --git a/src/datanode/src/region_server.rs b/src/datanode/src/region_server.rs
index b9576e38ad7f..491712e0d07d 100644
--- a/src/datanode/src/region_server.rs
+++ b/src/datanode/src/region_server.rs
@@ -254,11 +254,7 @@ impl RegionServer {
         let res = self
             .inner
             .handle_read(QueryRequest { plan, ..request })
-            .await;
-        if let Some(_permit) = permit {
-            drop(_permit)
-        };
-        res
+            .await
     }
 
     /// Returns all opened and reportable regions.