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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: mturquette@baylibre.com, sboyd@kernel.org,
	matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
	wenst@chromium.org, msp@baylibre.com, frank.li@vivo.com,
	robh@kernel.org, jamesjj.liao@mediatek.com,
	shunli.wang@mediatek.com, erin.lo@mediatek.com
Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH] clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data
Date: Fri,  1 Sep 2023 10:46:58 +0800	[thread overview]
Message-ID: <20230901024658.23405-1-jiasheng@iscas.ac.cn> (raw)

Add the check for the return value of mtk_alloc_clk_data() in order to
avoid NULL pointer dereference.

Fixes: e9862118272a ("clk: mediatek: Add MT2701 clock support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 drivers/clk/mediatek/clk-mt2701.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt2701.c b/drivers/clk/mediatek/clk-mt2701.c
index c81f3e33ce56..12d9560eb4ba 100644
--- a/drivers/clk/mediatek/clk-mt2701.c
+++ b/drivers/clk/mediatek/clk-mt2701.c
@@ -667,6 +667,8 @@ static int mtk_topckgen_init(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk_data = mtk_alloc_clk_data(CLK_TOP_NR);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
 								clk_data);
@@ -747,6 +749,8 @@ static void __init mtk_infrasys_init_early(struct device_node *node)
 
 	if (!infra_clk_data) {
 		infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+		if (!infra_clk_data)
+			return;
 
 		for (i = 0; i < CLK_INFRA_NR; i++)
 			infra_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
@@ -774,6 +778,8 @@ static int mtk_infrasys_init(struct platform_device *pdev)
 
 	if (!infra_clk_data) {
 		infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+		if (!infra_clk_data)
+			return -ENOMEM;
 	} else {
 		for (i = 0; i < CLK_INFRA_NR; i++) {
 			if (infra_clk_data->hws[i] == ERR_PTR(-EPROBE_DEFER))
@@ -890,6 +896,8 @@ static int mtk_pericfg_init(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk_data = mtk_alloc_clk_data(CLK_PERI_NR);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_gates(&pdev->dev, node, peri_clks,
 			       ARRAY_SIZE(peri_clks), clk_data);
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: mturquette@baylibre.com, sboyd@kernel.org,
	matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
	wenst@chromium.org, msp@baylibre.com, frank.li@vivo.com,
	robh@kernel.org, jamesjj.liao@mediatek.com,
	shunli.wang@mediatek.com, erin.lo@mediatek.com
Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH] clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data
Date: Fri,  1 Sep 2023 10:46:58 +0800	[thread overview]
Message-ID: <20230901024658.23405-1-jiasheng@iscas.ac.cn> (raw)

Add the check for the return value of mtk_alloc_clk_data() in order to
avoid NULL pointer dereference.

Fixes: e9862118272a ("clk: mediatek: Add MT2701 clock support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 drivers/clk/mediatek/clk-mt2701.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt2701.c b/drivers/clk/mediatek/clk-mt2701.c
index c81f3e33ce56..12d9560eb4ba 100644
--- a/drivers/clk/mediatek/clk-mt2701.c
+++ b/drivers/clk/mediatek/clk-mt2701.c
@@ -667,6 +667,8 @@ static int mtk_topckgen_init(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk_data = mtk_alloc_clk_data(CLK_TOP_NR);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
 								clk_data);
@@ -747,6 +749,8 @@ static void __init mtk_infrasys_init_early(struct device_node *node)
 
 	if (!infra_clk_data) {
 		infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+		if (!infra_clk_data)
+			return;
 
 		for (i = 0; i < CLK_INFRA_NR; i++)
 			infra_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
@@ -774,6 +778,8 @@ static int mtk_infrasys_init(struct platform_device *pdev)
 
 	if (!infra_clk_data) {
 		infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+		if (!infra_clk_data)
+			return -ENOMEM;
 	} else {
 		for (i = 0; i < CLK_INFRA_NR; i++) {
 			if (infra_clk_data->hws[i] == ERR_PTR(-EPROBE_DEFER))
@@ -890,6 +896,8 @@ static int mtk_pericfg_init(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk_data = mtk_alloc_clk_data(CLK_PERI_NR);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_gates(&pdev->dev, node, peri_clks,
 			       ARRAY_SIZE(peri_clks), clk_data);
-- 
2.25.1


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             reply	other threads:[~2023-09-01  2:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-01  2:46 Jiasheng Jiang [this message]
2023-09-01  2:46 ` [PATCH] clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data Jiasheng Jiang
2023-09-04  9:48 ` Markus Schneider-Pargmann
2023-09-04  9:48   ` Markus Schneider-Pargmann
2023-09-07  9:06 ` AngeloGioacchino Del Regno
2023-09-07  9:06   ` AngeloGioacchino Del Regno
2023-10-19  1:16 ` Stephen Boyd
2023-10-19  1:16   ` Stephen Boyd

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