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clk: mediatek: clk-mt6797: Add check for mtk_alloc_clk_data

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[ Upstream commit 606f6366a35a3329545e38129804d65ef26ed7d2 ]

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

Fixes: 96596aa066 ("clk: mediatek: add clk support for MT6797")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20230912093407.21505-3-jiasheng@iscas.ac.cn
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>
This commit is contained in:
Jiasheng Jiang 2023-09-12 17:34:05 +08:00 committed by Greg Kroah-Hartman
parent fbe466f06d
commit 2705c5b97f
1 changed files with 6 additions and 0 deletions
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6
drivers/clk/mediatek/clk-mt6797.c
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@ -392,6 +392,8 @@ 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_factors(top_fixed_divs, ARRAY_SIZE(top_fixed_divs),
clk_data);
@ -564,6 +566,8 @@ static void 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->clks[i] = ERR_PTR(-EPROBE_DEFER);
@ -588,6 +592,8 @@ 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->clks[i] == ERR_PTR(-EPROBE_DEFER))