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phy: mediatek: Fix missing check in mtk_mipi_tx_probe

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[ Upstream commit 399c91c3f30531593e5ff6ca7b53f47092128669 ]

The of_device_get_match_data() function may return NULL.
Add check to prevent potential null dereference.

Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20211224082103.7658-1-linmq006@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Miaoqian Lin
2021-12-24 08:21:03 +00:00
committed by Greg Kroah-Hartman
parent 5895474d21
commit d543ba3a61
1 changed files with 2 additions and 0 deletions
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2
drivers/phy/mediatek/phy-mtk-mipi-dsi.c
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@@ -146,6 +146,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev)
return -ENOMEM; return -ENOMEM;
mipi_tx->driver_data = of_device_get_match_data(dev); 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); mipi_tx->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mipi_tx->regs)) if (IS_ERR(mipi_tx->regs))