From 43f5ac6a28f02e9d154b36668717891252e87d64 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 6 Jul 2015 14:09:23 -0700
Subject: [PATCH] Guard against double pollset shutdown completion

---
 src/core/iomgr/pollset_posix.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/iomgr/pollset_posix.c b/src/core/iomgr/pollset_posix.c
index 15ed8e75e6c..12496440ded 100644
--- a/src/core/iomgr/pollset_posix.c
+++ b/src/core/iomgr/pollset_posix.c
@@ -249,7 +249,8 @@ static void basic_do_promote(void *args, int success) {
   pollset->in_flight_cbs--;
   if (pollset->shutting_down) {
     /* We don't care about this pollset anymore. */
-    if (pollset->in_flight_cbs == 0 && pollset->counter == 0) {
+    if (pollset->in_flight_cbs == 0 && pollset->counter == 0 && !pollset->called_shutdown) {
+      pollset->called_shutdown = 1;
       do_shutdown_cb = 1;
     }
   } else if (grpc_fd_is_orphaned(fd)) {