From: Zhanhao Hu <zero12113@hust.edu.cn>
Date: Thu, 1 Jun 2023 03:38:25 +0000 (+0000)
Subject: clk: imx93: fix memory leak and missing unwind goto in imx93_clocks_probe
X-Git-Tag: v6.1.39~338
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=280a5ff665e12d1e0c54c20cedc9c5008aa686a5;p=platform%2Fkernel%2Flinux-starfive.git

clk: imx93: fix memory leak and missing unwind goto in imx93_clocks_probe

[ Upstream commit e02ba11b457647050cb16e7cad16cec3c252fade ]

In function probe(), it returns directly without unregistered hws
when error occurs.

Fix this by adding 'goto unregister_hws;' on line 295 and
line 310.

Use devm_kzalloc() instead of kzalloc() to automatically
free the memory using devm_kfree() when error occurs.

Replace of_iomap() with devm_of_iomap() to automatically
handle the unused ioremap region and delete 'iounmap(anatop_base);'
in unregister_hws.

Fixes: 24defbe194b6 ("clk: imx: add i.MX93 clk")
Signed-off-by: Zhanhao Hu <zero12113@hust.edu.cn>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230601033825.336558-1-zero12113@hust.edu.cn
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c
index 02d6a98..5e3d299 100644
--- a/drivers/clk/imx/clk-imx93.c
+++ b/drivers/clk/imx/clk-imx93.c
@@ -261,7 +261,7 @@ static int imx93_clocks_probe(struct platform_device *pdev)
 	void __iomem *base, *anatop_base;
 	int i, ret;
 
-	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
+	clk_hw_data = devm_kzalloc(dev, struct_size(clk_hw_data, hws,
 					  IMX93_CLK_END), GFP_KERNEL);
 	if (!clk_hw_data)
 		return -ENOMEM;
@@ -285,10 +285,12 @@ static int imx93_clocks_probe(struct platform_device *pdev)
 								    "sys_pll_pfd2", 1, 2);
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx93-anatop");
-	anatop_base = of_iomap(np, 0);
+	anatop_base = devm_of_iomap(dev, np, 0, NULL);
 	of_node_put(np);
-	if (WARN_ON(!anatop_base))
-		return -ENOMEM;
+	if (WARN_ON(IS_ERR(anatop_base))) {
+		ret = PTR_ERR(base);
+		goto unregister_hws;
+	}
 
 	clks[IMX93_CLK_AUDIO_PLL] = imx_clk_fracn_gppll("audio_pll", "osc_24m", anatop_base + 0x1200,
 							&imx_fracn_gppll);
@@ -298,8 +300,8 @@ static int imx93_clocks_probe(struct platform_device *pdev)
 	np = dev->of_node;
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (WARN_ON(IS_ERR(base))) {
-		iounmap(anatop_base);
-		return PTR_ERR(base);
+		ret = PTR_ERR(base);
+		goto unregister_hws;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(root_array); i++) {
@@ -329,7 +331,6 @@ static int imx93_clocks_probe(struct platform_device *pdev)
 
 unregister_hws:
 	imx_unregister_hw_clocks(clks, IMX93_CLK_END);
-	iounmap(anatop_base);
 
 	return ret;
 }