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![Nicolin Chen](https://secure.gravatar.com/avatar/f606eae2e3451996df5c7604a199107c.jpg?s=96&d=mm)
Nicolin Chen committed d78a975525f
drm/tegra: hub: Do not enable orphaned window group [ Upstream commit ef4e417eb3ec7fe657928f10ac1d2154d8a5fb38 ] Though the unconditional enable/disable code is not a final solution, we don't want to run into a NULL pointer situation when window group doesn't link to its DC parent if the DC is disabled in Device Tree. So this patch simply adds a check to make sure that window group has a valid parent before running into tegra_windowgroup_enable/disable. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>