linux-kernel - [PATCH] clk/mediatek: fix missing null-check for mt7622

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Message-Id: <20211030140740.6947-1-cyeaa@connect.ust.hk>
Date:   Sat, 30 Oct 2021 07:07:40 -0700
From:   Chengfeng Ye <cyeaa@...nect.ust.hk>
To:     mturquette@...libre.com, sboyd@...nel.org, matthias.bgg@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Chengfeng Ye <cyeaa@...nect.ust.hk>
Subject: [PATCH] clk/mediatek: fix missing null-check for mt7622

The return pointer of mtk_alloc_clk_data could
be null, adding null check for all the call sites.

Signed-off-by: Chengfeng Ye <cyeaa@...nect.ust.hk>
---
 drivers/clk/mediatek/clk-mt7622.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt7622.c b/drivers/clk/mediatek/clk-mt7622.c
index ef5947e15c75..f16b3655ff76 100644
--- a/drivers/clk/mediatek/clk-mt7622.c
+++ b/drivers/clk/mediatek/clk-mt7622.c
@@ -620,6 +620,8 @@ static int mtk_topckgen_init(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(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
 				    clk_data);
@@ -650,6 +652,8 @@ static int mtk_infrasys_init(struct platform_device *pdev)
 	int r;
 
 	clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_gates(node, infra_clks, ARRAY_SIZE(infra_clks),
 			       clk_data);
@@ -700,6 +704,8 @@ static int mtk_pericfg_init(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK);
+	if (!clk_data)
+		return -ENOMEM;
 
 	mtk_clk_register_gates(node, peri_clks, ARRAY_SIZE(peri_clks),
 			       clk_data);
-- 
2.17.1