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Message-Id: <20211224082103.7658-1-linmq006@gmail.com>
Date: Fri, 24 Dec 2021 08:21:03 +0000
From: Miaoqian Lin <linmq006@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linmq006@...il.com, Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
dri-devel@...ts.freedesktop.org,
linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] phy: mediatek: Fix missing check in mtk_mipi_tx_probe
The of_device_get_match_data() function may return NULL.
Add check to prevent potential null dereference.
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
drivers/phy/mediatek/phy-mtk-mipi-dsi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
index 28ad9403c441..67b005d5b9e3 100644
--- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
+++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
@@ -146,6 +146,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev)
return -ENOMEM;
mipi_tx->driver_data = of_device_get_match_data(dev);
+ if (!mipi_tx->driver_data)
+ return -ENODEV;
mipi_tx->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mipi_tx->regs))
--
2.17.1
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