drm/tegra: hub: Fix dereference before check (7cf77b27) · Commits · 戴 / test

drivers/gpu/drm/tegra/hub.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -378,14 +378,16 @@ static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
		static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
		struct drm_plane_state *old_state)
		{
		struct tegra_dc *dc = to_tegra_dc(old_state->crtc);
		struct tegra_plane *p = to_tegra_plane(plane);
		struct tegra_dc *dc;
		u32 value;

		/* rien ne va plus */
		if (!old_state \|\| !old_state->crtc)
		return;

		dc = to_tegra_dc(old_state->crtc);

		/*
		* XXX Legacy helpers seem to sometimes call ->atomic_disable() even
		* on planes that are already disabled. Make sure we fallback to the