Author: Markus Elfring <elfring@users.sourceforge.net> The following functions test whether their argument is NULL and then return immediately. * backlight_device_unregister * drm_gem_object_unreference_unlocked Thus the test around the calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/72ff4670-4f3d-c7ed-4f37-e49f2bbc7aba@users.sourceforge.net — drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 3 +– drivers/gpu/drm/omapdrm/omap_fb.c | 4 …