From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Fri, 1 Sep 2023 02:46:58 +0000 (+0800)
Subject: clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data
X-Git-Tag: v6.5.12~372
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e61934720af4a58ffd43a63ffdd6f3a0bd7d7b47;p=thirdparty%2Fkernel%2Fstable.git

clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data

[ Upstream commit 0d6e24b422a2166a9297a8286ff2e6ab9a5e8cd3 ]

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>
Link: https://lore.kernel.org/r/20230901024658.23405-1-jiasheng@iscas.ac.cn
Reviewed-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/clk/mediatek/clk-mt2701.c b/drivers/clk/mediatek/clk-mt2701.c
index 4a154da8a5430..ae4405ca5bfa0 100644
--- a/drivers/clk/mediatek/clk-mt2701.c
+++ b/drivers/clk/mediatek/clk-mt2701.c
@@ -670,6 +670,8 @@ 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);
@@ -750,6 +752,8 @@ 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);
@@ -777,6 +781,8 @@ 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))
@@ -894,6 +900,8 @@ 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);