linux-kernel - [PATCH AUTOSEL 6.2 16/25] hwmon: (xgene) Fix ioremap and memremap leak

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Date:   Fri, 31 Mar 2023 21:41:14 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tianyi Jing <jingfelix@...t.edu.cn>,
        Dongliang Mu <dzm91@...t.edu.cn>,
        Guenter Roeck <linux@...ck-us.net>,
        Sasha Levin <sashal@...nel.org>, jdelvare@...e.com,
        linux-hwmon@...r.kernel.org
Subject: [PATCH AUTOSEL 6.2 16/25] hwmon: (xgene) Fix ioremap and memremap leak

From: Tianyi Jing <jingfelix@...t.edu.cn>

[ Upstream commit 813cc94c7847ae4a17e9f744fb4dbdf7df6bd732 ]

Smatch reports:

drivers/hwmon/xgene-hwmon.c:757 xgene_hwmon_probe() warn:
'ctx->pcc_comm_addr' from ioremap() not released on line: 757.

This is because in drivers/hwmon/xgene-hwmon.c:701 xgene_hwmon_probe(),
ioremap and memremap is not released, which may cause a leak.

To fix this, ioremap and memremap is modified to devm_ioremap and
devm_memremap.

Signed-off-by: Tianyi Jing <jingfelix@...t.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
Link: https://lore.kernel.org/r/20230318143851.2191625-1-jingfelix@hust.edu.cn
[groeck: Fixed formatting and subject]
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hwmon/xgene-hwmon.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
index d1abea49f01be..78d9f52e2a719 100644
--- a/drivers/hwmon/xgene-hwmon.c
+++ b/drivers/hwmon/xgene-hwmon.c
@@ -698,14 +698,14 @@ static int xgene_hwmon_probe(struct platform_device *pdev)
 		ctx->comm_base_addr = pcc_chan->shmem_base_addr;
 		if (ctx->comm_base_addr) {
 			if (version == XGENE_HWMON_V2)
-				ctx->pcc_comm_addr = (void __force *)ioremap(
-							ctx->comm_base_addr,
-							pcc_chan->shmem_size);
+				ctx->pcc_comm_addr = (void __force *)devm_ioremap(&pdev->dev,
+								  ctx->comm_base_addr,
+								  pcc_chan->shmem_size);
 			else
-				ctx->pcc_comm_addr = memremap(
-							ctx->comm_base_addr,
-							pcc_chan->shmem_size,
-							MEMREMAP_WB);
+				ctx->pcc_comm_addr = devm_memremap(&pdev->dev,
+								   ctx->comm_base_addr,
+								   pcc_chan->shmem_size,
+								   MEMREMAP_WB);
 		} else {
 			dev_err(&pdev->dev, "Failed to get PCC comm region\n");
 			rc = -ENODEV;
-- 
2.39.2