From: Miaoqian Lin linmq006@gmail.com

[ 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 --- drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c index 8cee2591e7284..ccc742dc78bd9 100644 --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c @@ -147,6 +147,8 @@ 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;

mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); mipi_tx->regs = devm_ioremap_resource(dev, mem);