linux-kernel - [PATCH 2/3] RAS/CEC: make ces

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Message-Id: <20190418034115.75954-2-chao.wang@ucloud.cn>
Date:   Thu, 18 Apr 2019 11:41:14 +0800
From:   WANG Chao <chao.wang@...oud.cn>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
        linux-edac@...r.kernel.org
Subject: [PATCH 2/3] RAS/CEC: make ces_entered smp safe

ces_entered should be put in a critical section to avoid race condition.

Signed-off-by: WANG Chao <chao.wang@...oud.cn>
---
 drivers/ras/cec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
index 2e0bf1269c31..702e4c02c713 100644
--- a/drivers/ras/cec.c
+++ b/drivers/ras/cec.c
@@ -286,10 +286,10 @@ int cec_add_elem(u64 pfn)
 	if (!ce_arr.array || ce_arr.disabled)
 		return -ENODEV;
 
-	ca->ces_entered++;
-
 	mutex_lock(&ce_mutex);
 
+	ca->ces_entered++;
+
 	if (ca->n == MAX_ELEMS)
 		WARN_ON(!del_lru_elem_unlocked(ca));
 
-- 
2.21.0