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 c81f3e3..12d9560 100644 (file)
--- 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);