From de803fb7d2d7355834f84b3fbb8f09ff60058afd Mon Sep 17 00:00:00 2001
From: Xie XiuQi <xiexiuqi@huawei.com>
Date: Tue, 29 Jan 2019 17:38:48 +0800
Subject: [PATCH 2843/2944] openEuler: arm64/mpam: don't allowd create
 mon_groups when out of mon/pmg

commit 794555b36a5200c901c1abc5db9612f6ec451b58 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>
---
 fs/resctrlfs.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/resctrlfs.c b/fs/resctrlfs.c
index 785ff103..6d68537 100644
--- a/fs/resctrlfs.c
+++ b/fs/resctrlfs.c
@@ -559,7 +559,12 @@ static int mkdir_resctrl_prepare(struct kernfs_node *parent_kn,
 
 	if (resctrl_mon_capable) {
 #ifdef CONFIG_ARM64
-		resctrl_mkdir_ctrlmon_mondata(kn, rdtgrp, &rdtgrp->mon.mon_data_kn);
+		ret = resctrl_mkdir_ctrlmon_mondata(kn, rdtgrp, &rdtgrp->mon.mon_data_kn);
+		if (ret < 0) {
+			rdt_last_cmd_puts("out of monitors or PMGs\n");
+			goto out_destroy;
+		}
+
 #else
 		ret = alloc_mon_id();
 		if (ret < 0) {
-- 
1.8.3.1