This is a note to let you know that I've just added the patch titled
phy: mediatek: Fix missing check in mtk_mipi_tx_probe
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
phy-mediatek-fix-missing-check-in-mtk_mipi_tx_probe.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8cd6354ef6035785bb7f499c98e67130d510c838
Author: Miaoqian Lin <linmq006@xxxxxxxxx>
Date: Fri Dec 24 08:21:03 2021 +0000
phy: mediatek: Fix missing check in mtk_mipi_tx_probe
[ 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@xxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211224082103.7658-1-linmq006@xxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
index 28ad9403c4414..67b005d5b9e35 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))
