linux-kernel - [PATCH v2] memory: samsung: exynos-srom: Fix of_iomap leak in exynos_srom

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Message-Id: <20250806025538.306593-1-zhen.ni@easystack.cn>
Date: Wed,  6 Aug 2025 10:55:38 +0800
From: Zhen Ni <zhen.ni@...ystack.cn>
To: krzk@...nel.org,
	alim.akhtar@...sung.com
Cc: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	Zhen Ni <zhen.ni@...ystack.cn>,
	stable@...r.kernel.org
Subject: [PATCH v2] memory: samsung: exynos-srom: Fix of_iomap leak in exynos_srom_probe

The of_platform_populate() call at the end of the function has a
possible failure path, causing a resource leak.

Replace of_iomap() with devm_platform_ioremap_resource() to ensure
automatic cleanup of srom->reg_base.

This issue was detected by smatch static analysis:
drivers/memory/samsung/exynos-srom.c:155 exynos_srom_probe()warn:
'srom->reg_base' from of_iomap() not released on lines: 155.

Fixes: 8ac2266d8831 ("memory: samsung: exynos-srom: Add support for bank configuration")
Cc: stable@...r.kernel.org
Signed-off-by: Zhen Ni <zhen.ni@...ystack.cn>
---
chanegs in v2:
- Update commit msg
---
 drivers/memory/samsung/exynos-srom.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/memory/samsung/exynos-srom.c b/drivers/memory/samsung/exynos-srom.c
index e73dd330af47..d913fb901973 100644
--- a/drivers/memory/samsung/exynos-srom.c
+++ b/drivers/memory/samsung/exynos-srom.c
@@ -121,20 +121,18 @@ static int exynos_srom_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	srom->dev = dev;
-	srom->reg_base = of_iomap(np, 0);
-	if (!srom->reg_base) {
+	srom->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(srom->reg_base)) {
 		dev_err(&pdev->dev, "iomap of exynos srom controller failed\n");
-		return -ENOMEM;
+		return PTR_ERR(srom->reg_base);
 	}
 
 	platform_set_drvdata(pdev, srom);
 
 	srom->reg_offset = exynos_srom_alloc_reg_dump(exynos_srom_offsets,
 						      ARRAY_SIZE(exynos_srom_offsets));
-	if (!srom->reg_offset) {
-		iounmap(srom->reg_base);
+	if (!srom->reg_offset)
 		return -ENOMEM;
-	}
 
 	for_each_child_of_node(np, child) {
 		if (exynos_srom_configure_bank(srom, child)) {
-- 
2.20.1