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| author | Chen Ni <nichen@iscas.ac.cn> | 2023-10-24 08:07:38 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-26 18:22:37 -0400 |
| commit | 47a13d0b9d8527518639ab5c39667f69d6203e80 (patch) | |
| tree | ac180bd2ff131db83b328af83558723a8e80291f | |
| parent | 69836d9329f0b4c58faaf3d886a7748ddb5bf718 (diff) | |
| download | linux-stable-47a13d0b9d8527518639ab5c39667f69d6203e80.tar.gz linux-stable-47a13d0b9d8527518639ab5c39667f69d6203e80.tar.bz2 linux-stable-47a13d0b9d8527518639ab5c39667f69d6203e80.zip | |
drm/tegra: dsi: Add missing check for of_find_device_by_node
[ Upstream commit afe6fcb9775882230cd29b529203eabd5d2a638d ]
Add check for the return value of of_find_device_by_node() and return
the error if it fails in order to avoid NULL pointer dereference.
Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231024080738.825553-1-nichen@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index e2903bf7821b..70cc960d3ff5 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -1452,9 +1452,11 @@ static int tegra_dsi_ganged_probe(struct tegra_dsi *dsi) np = of_parse_phandle(dsi->dev->of_node, "nvidia,ganged-mode", 0); if (np) { struct platform_device *gangster = of_find_device_by_node(np); + of_node_put(np); + if (!gangster) + return -EPROBE_DEFER; dsi->slave = platform_get_drvdata(gangster); - of_node_put(np); if (!dsi->slave) { put_device(&gangster->dev); |