drm/nouveau: fix null pointer dereference in poll_changed

Fixes vgaswitcheroo on a card without display. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
git-mirror · Jul 30, 2013 · 8a25835 · 8a25835
1 parent 8ff8605
commit 8a25835
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -398,7 +398,8 @@ void
 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
-	drm_fb_helper_hotplug_event(&drm->fbcon->helper);
+	if (drm->fbcon)
+		drm_fb_helper_hotplug_event(&drm->fbcon->helper);
 }
 
 static int