clk: mediatek: clk-mt6765: Add check for mtk_alloc_clk_data

[ Upstream commit b82681042724924ae3ba0f2f2eeec217fa31e830 ]

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

Fixes: 1aca9939bf72 ("clk: mediatek: Add MT6765 clock support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20230912093407.21505-1-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>

diff --git a/drivers/clk/mediatek/clk-mt6765.c b/drivers/clk/mediatek/clk-mt6765.c
index 1f4c8d0..9c7f740 100644 (file)
--- a/drivers/clk/mediatek/clk-mt6765.c
+++ b/drivers/clk/mediatek/clk-mt6765.c
@@ -737,6 +737,8 @@ static int clk_mt6765_apmixed_probe(struct platform_device *pdev)
                return PTR_ERR(base);
 
        clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
+       if (!clk_data)
+               return -ENOMEM;
 
        mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
 
@@ -769,6 +771,8 @@ static int clk_mt6765_top_probe(struct platform_device *pdev)
                return PTR_ERR(base);
 
        clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
+       if (!clk_data)
+               return -ENOMEM;
 
        mtk_clk_register_fixed_clks(fixed_clks, ARRAY_SIZE(fixed_clks),
                                    clk_data);
@@ -807,6 +811,8 @@ static int clk_mt6765_ifr_probe(struct platform_device *pdev)
                return PTR_ERR(base);
 
        clk_data = mtk_alloc_clk_data(CLK_IFR_NR_CLK);
+       if (!clk_data)
+               return -ENOMEM;
 
        mtk_clk_register_gates(&pdev->dev, node, ifr_clks,
                               ARRAY_SIZE(ifr_clks), clk_data);