drm/nv40/therm: fix slowing down fan when pstate undefined

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c
index 21b2b30..80e584a 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c
@@ -117,7 +117,8 @@ nouveau_therm_update(struct nouveau_therm *therm, int mode)
                    priv->fan->bios.linear_max_temp) {
                        duty = nouveau_therm_update_linear(therm);
                } else {
-                       duty = priv->cstate;
+                       if (priv->cstate)
+                               duty = priv->cstate;
                        poll = false;
                }
                immd = false;