Hello Thierry Reding, This is a semi-automatic email about new static checker warnings. The patch c4755fb9064f: "drm/tegra: Add Tegra186 display hub support" from Nov 13, 2017, leads to the following Smatch complaint: drivers/gpu/drm/tegra/hub.c:375 tegra_shared_plane_atomic_disable() warn: variable dereferenced before check 'old_state' (see line 370) drivers/gpu/drm/tegra/hub.c 369 { 370 struct tegra_dc *dc = to_tegra_dc(old_state->crtc); ^^^^^^^^^^^^^^^ Deref 371 struct tegra_plane *p = to_tegra_plane(plane); 372 u32 value; 373 374 /* rien ne va plus */ 375 if (!old_state || !old_state->crtc) ^^^^^^^^^ Check too late. 376 return; 377 regards, dan carpenter -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html