From 272a961e7d369cef0c208e58f98eaba8575b02f9 Mon Sep 17 00:00:00 2001
From: Xie XiuQi <xiexiuqi@huawei.com>
Date: Tue, 29 Jan 2019 17:38:38 +0800
Subject: [PATCH 2833/2944] openEuler: arm64/mpam: mon: add WARN_ON for debug
 free_pmg

commit 81ef5294de16ef6c8fec8a8aab509212d2240623 openEuler-1.0

hulk inclusion
category: feature
bugzilla: 5510
CVE: NA

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Xin Hao <haoxing990@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@openanolis.org>
---
 arch/arm64/kernel/mpam_mon.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/mpam_mon.c b/arch/arm64/kernel/mpam_mon.c
index ae946b2..0a3a202 100644
--- a/arch/arm64/kernel/mpam_mon.c
+++ b/arch/arm64/kernel/mpam_mon.c
@@ -64,6 +64,8 @@ int alloc_pmg(void)
 
 void free_pmg(u32 pmg)
 {
+	WARN_ON(!pmg);
+
 	pmg_free_map |= 1 << pmg;
 }
 
-- 
1.8.3.1