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

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

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c
index 21b2b3021fad..80e584a1bd1c 100644
--- 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;