linux-kernel - [PATCH] thermal: mediatek: Fix some leaks in mtk_thermal

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Date:   Mon,  7 Mar 2022 11:34:38 +0000
From:   Miaoqian Lin <linmq006@...il.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Henry Yen <henry.yen@...iatek.com>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] thermal: mediatek: Fix some leaks in mtk_thermal_probe

If an error occurs after a successful 'of_iomap()' call, it must be undone
by a corresponding 'iounmap()' call

Fixes: 89945047b166 ("thermal: mediatek: Add tsensor support for V2 thermal system")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/thermal/mtk_thermal.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index ede94eadddda..9d7461a5c2c1 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -1035,13 +1035,15 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 
 	if (auxadc_phys_base == OF_BAD_ADDR) {
 		dev_err(&pdev->dev, "Can't get auxadc phys address\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_umap_auxadc;
 	}
 
 	apmixedsys = of_parse_phandle(np, "mediatek,apmixedsys", 0);
 	if (!apmixedsys) {
 		dev_err(&pdev->dev, "missing apmixedsys node\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto err_umap_auxadc;
 	}
 
 	apmixed_base = of_iomap(apmixedsys, 0);
@@ -1051,17 +1053,18 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 
 	if (apmixed_phys_base == OF_BAD_ADDR) {
 		dev_err(&pdev->dev, "Can't get auxadc phys address\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto  err_umap_apmixed;
 	}
 
 	ret = device_reset_optional(&pdev->dev);
 	if (ret)
-		return ret;
+		goto err_umap_apmixed;
 
 	ret = clk_prepare_enable(mt->clk_auxadc);
 	if (ret) {
 		dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
-		return ret;
+		goto err_umap_apmixed;
 	}
 
 	ret = clk_prepare_enable(mt->clk_peri_therm);
@@ -1099,6 +1102,10 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 	clk_disable_unprepare(mt->clk_peri_therm);
 err_disable_clk_auxadc:
 	clk_disable_unprepare(mt->clk_auxadc);
+err_umap_apmixed:
+	iounmap(apmixed_base);
+err_umap_auxadc:
+	iounmap(auxadc_base);
 
 	return ret;
 }
-- 
2.17.1