From e45bea777eb662951bafc506ea9383e940247269 Mon Sep 17 00:00:00 2001
From: Qiancheng Zhao <qianchengz@google.com>
Date: Mon, 19 Aug 2019 15:43:12 -0700
Subject: [PATCH] use acquire instead of relaxed in IdleTimerCallback()

---
 src/core/ext/filters/client_idle/client_idle_filter.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/ext/filters/client_idle/client_idle_filter.cc b/src/core/ext/filters/client_idle/client_idle_filter.cc
index 13c35ae3730..9da098d6d6d 100644
--- a/src/core/ext/filters/client_idle/client_idle_filter.cc
+++ b/src/core/ext/filters/client_idle/client_idle_filter.cc
@@ -320,7 +320,7 @@ void ChannelData::IdleTimerCallback(void* arg, grpc_error* error) {
         // EnterIdle() operation finishes, preventing mistakenly entering IDLE
         // when active RPC exists.
         finished = chand->state_.CompareExchangeWeak(
-            &state, PROCESSING, MemoryOrder::RELAXED, MemoryOrder::RELAXED);
+            &state, PROCESSING, MemoryOrder::ACQUIRE, MemoryOrder::RELAXED);
         if (finished) {
           chand->EnterIdle();
           chand->state_.Store(IDLE, MemoryOrder::RELAXED);