linux-kernel - [PATCH v2] drivers: loongson: fix memory leak in loongson2_guts

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Date:   Mon,  6 Mar 2023 10:53:07 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Yinbo Zhu <zhuyinbo@...ngson.cn>
Cc:     Dongliang Mu <dzm91@...t.edu.cn>, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] drivers: loongson: fix memory leak in loongson2_guts_probe

drivers/soc/loongson/loongson2_guts.c:150 loongson2_guts_probe()
warn: 'guts->regs' from ioremap() not released on lines: 131,135,139,143.

Fix this by modifying ioremap to devm_ioremap.

Note that, this patch is not tested due to the loongson architecture.

Signed-off-by: Dongliang Mu <dzm91@...t.edu.cn>
---
v1->v2: instead of modifying error handling code, directly change
ioremap to devm_ioremap.
 drivers/soc/loongson/loongson2_guts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/loongson/loongson2_guts.c b/drivers/soc/loongson/loongson2_guts.c
index bace4bc8e03b..a053e3fdae09 100644
--- a/drivers/soc/loongson/loongson2_guts.c
+++ b/drivers/soc/loongson/loongson2_guts.c
@@ -107,7 +107,7 @@ static int loongson2_guts_probe(struct platform_device *pdev)
 	guts->little_endian = of_property_read_bool(np, "little-endian");
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	guts->regs = ioremap(res->start, res->end - res->start + 1);
+	guts->regs = devm_ioremap(dev, res->start, res->end - res->start + 1);
 	if (IS_ERR(guts->regs))
 		return PTR_ERR(guts->regs);
 
-- 
2.39.2