| Message ID | 20231024080738.825553-1-nichen@iscas.ac.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/tegra: dsi: Add missing check for of_find_device_by_node | expand |
On Tue, Oct 24, 2023 at 08:07:38AM +0000, Chen Ni wrote: > 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> > --- > drivers/gpu/drm/tegra/dsi.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) Applied, thanks. Thierry
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index a9870c828374..4101b2e01211 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -1543,9 +1543,11 @@ 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);
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> --- drivers/gpu/drm/tegra/dsi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)