linux-kernel - [PATCH 1/2] clk: imx: imx8m: avoid memory leak

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Date:   Tue, 28 Jul 2020 10:54:48 +0800
From:   peng.fan@....com
To:     sboyd@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        festevam@...il.com, abel.vesa@....com
Cc:     kernel@...gutronix.de, linux-imx@....com, Anson.Huang@....com,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 1/2] clk: imx: imx8m: avoid memory leak

From: Peng Fan <peng.fan@....com>

Use devm_kzalloc to avoid memory leak when probe fail.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/clk/imx/clk-imx8mm.c |  3 +--
 drivers/clk/imx/clk-imx8mn.c | 15 +++++----------
 drivers/clk/imx/clk-imx8mp.c |  2 +-
 drivers/clk/imx/clk-imx8mq.c |  3 +--
 4 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index b793264c21c6..b43dbe305e7a 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -306,8 +306,7 @@ static int imx8mm_clocks_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int ret, i;
 
-	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
-					  IMX8MM_CLK_END), GFP_KERNEL);
+	clk_hw_data = devm_kzalloc(dev, struct_size(clk_hw_data, hws, IMX8MM_CLK_END), GFP_KERNEL);
 	if (WARN_ON(!clk_hw_data))
 		return -ENOMEM;
 
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
index 213cc37b3173..4189f7f6980e 100644
--- a/drivers/clk/imx/clk-imx8mn.c
+++ b/drivers/clk/imx/clk-imx8mn.c
@@ -299,8 +299,7 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int ret, i;
 
-	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
-					  IMX8MN_CLK_END), GFP_KERNEL);
+	clk_hw_data = devm_kzalloc(dev, struct_size(clk_hw_data, hws, IMX8MN_CLK_END), GFP_KERNEL);
 	if (WARN_ON(!clk_hw_data))
 		return -ENOMEM;
 
@@ -318,10 +317,8 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx8mn-anatop");
 	base = of_iomap(np, 0);
 	of_node_put(np);
-	if (WARN_ON(!base)) {
-		ret = -ENOMEM;
-		goto unregister_hws;
-	}
+	if (WARN_ON(!base))
+		return -ENOMEM;
 
 	hws[IMX8MN_AUDIO_PLL1_REF_SEL] = imx_clk_hw_mux("audio_pll1_ref_sel", base + 0x0, 0, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
 	hws[IMX8MN_AUDIO_PLL2_REF_SEL] = imx_clk_hw_mux("audio_pll2_ref_sel", base + 0x14, 0, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
@@ -407,10 +404,8 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
 
 	np = dev->of_node;
 	base = devm_platform_ioremap_resource(pdev, 0);
-	if (WARN_ON(IS_ERR(base))) {
-		ret = PTR_ERR(base);
-		goto unregister_hws;
-	}
+	if (WARN_ON(IS_ERR(base)))
+		return PTR_ERR(base);
 
 	/* CORE */
 	hws[IMX8MN_CLK_A53_DIV] = imx8m_clk_hw_composite_core("arm_a53_div", imx8mn_a53_sels, base + 0x8000);
diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
index ca747712400f..f6ec7b2b8038 100644
--- a/drivers/clk/imx/clk-imx8mp.c
+++ b/drivers/clk/imx/clk-imx8mp.c
@@ -447,7 +447,7 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
 		return PTR_ERR(ccm_base);
 	}
 
-	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws, IMX8MP_CLK_END), GFP_KERNEL);
+	clk_hw_data = devm_kzalloc(dev, struct_size(clk_hw_data, hws, IMX8MP_CLK_END), GFP_KERNEL);
 	if (WARN_ON(!clk_hw_data)) {
 		iounmap(anatop_base);
 		return -ENOMEM;
diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
index a64aace213c2..0106a33c24a4 100644
--- a/drivers/clk/imx/clk-imx8mq.c
+++ b/drivers/clk/imx/clk-imx8mq.c
@@ -288,8 +288,7 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int err, i;
 
-	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
-					  IMX8MQ_CLK_END), GFP_KERNEL);
+	clk_hw_data = devm_kzalloc(dev, struct_size(clk_hw_data, hws, IMX8MQ_CLK_END), GFP_KERNEL);
 	if (WARN_ON(!clk_hw_data))
 		return -ENOMEM;
 
-- 
2.16.4