openwrt/target/linux/mediatek/patches-6.1/830-v6.4-22-thermal-drivers-mediatek-Use-devm_of_iomap-to-avoid-.patch

From 458fa1d508de3f17e49d974a0158d9aeff273a58 Mon Sep 17 00:00:00 2001
From: Kang Chen <[email protected]>
Date: Wed, 19 Apr 2023 10:07:48 +0800
Subject: [PATCH 18/42] thermal/drivers/mediatek: Use devm_of_iomap to avoid
 resource leak in mtk_thermal_probe

Smatch reports:
1. mtk_thermal_probe() warn: 'apmixed_base' from of_iomap() not released.
2. mtk_thermal_probe() warn: 'auxadc_base' from of_iomap() not released.

The original code forgets to release iomap resource when handling errors,
fix it by switch to devm_of_iomap.

Fixes: 89945047b166 ("thermal: mediatek: Add tsensor support for V2 thermal system")
Signed-off-by: Kang Chen <[email protected]>
Reviewed-by: Dongliang Mu <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
---
 drivers/thermal/mediatek/auxadc_thermal.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

--- a/drivers/thermal/mediatek/auxadc_thermal.c
+++ b/drivers/thermal/mediatek/auxadc_thermal.c
@@ -1232,7 +1232,12 @@ static int mtk_thermal_probe(struct plat
 		return -ENODEV;
 	}
 
-	auxadc_base = of_iomap(auxadc, 0);
+	auxadc_base = devm_of_iomap(&pdev->dev, auxadc, 0, NULL);
+	if (IS_ERR(auxadc_base)) {
+		of_node_put(auxadc);
+		return PTR_ERR(auxadc_base);
+	}
+
 	auxadc_phys_base = of_get_phys_base(auxadc);
 
 	of_node_put(auxadc);
@@ -1248,7 +1253,12 @@ static int mtk_thermal_probe(struct plat
 		return -ENODEV;
 	}
 
-	apmixed_base = of_iomap(apmixedsys, 0);
+	apmixed_base = devm_of_iomap(&pdev->dev, apmixedsys, 0, NULL);
+	if (IS_ERR(apmixed_base)) {
+		of_node_put(apmixedsys);
+		return PTR_ERR(apmixed_base);
+	}
+
 	apmixed_phys_base = of_get_phys_base(apmixedsys);
 
 	of_node_put(apmixedsys);