From bb28be8adc8758d924fa18593cd7fd315a851aa9 Mon Sep 17 00:00:00 2001
From: Liang Yan <liang.z.yan@intel.com>
Date: Wed, 15 Nov 2017 17:09:56 +0800
Subject: [PATCH] event: ignore duplicated shutdown signals if signal received

Change-Id: Ib1e184f831eef82432308279c6d8ea43088748ef
Signed-off-by: Liang Yan <liang.z.yan@intel.com>
Reviewed-on: https://review.gerrithub.io/387273
Reviewed-by: Ziye Yang <optimistyzy@gmail.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
---
 lib/event/app.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/event/app.c b/lib/event/app.c
index 7c577a577..401038bb0 100644
--- a/lib/event/app.c
+++ b/lib/event/app.c
@@ -58,6 +58,7 @@ struct spdk_app {
 static struct spdk_app g_spdk_app;
 static struct spdk_event *g_shutdown_event = NULL;
 static int g_init_lcore;
+static bool g_shutdown_sig_received = false;
 
 static spdk_event_fn g_app_start_fn;
 static void *g_app_start_arg1;
@@ -169,7 +170,10 @@ spdk_app_start_shutdown(void)
 static void
 __shutdown_signal(int signo)
 {
-	spdk_app_start_shutdown();
+	if (!g_shutdown_sig_received) {
+		g_shutdown_sig_received = true;
+		spdk_app_start_shutdown();
+	}
 }
 
 static void