drm/nouveau/therm/nv84+: do not expose non-calibrated internal temp sensor

Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/nv84.c b/drivers/gpu/drm/nouveau/core/subdev/therm/nv84.c
index 38b16d9..14e2e09 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/therm/nv84.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/therm/nv84.c
@@ -33,7 +33,12 @@ struct nv84_therm_priv {
 int
 nv84_temp_get(struct nouveau_therm *therm)
 {
-       return nv_rd32(therm, 0x20400);
+       struct nouveau_fuse *fuse = nouveau_fuse(therm);
+
+       if (nv_ro32(fuse, 0x1a8) == 1)
+               return nv_rd32(therm, 0x20400);
+       else
+               return -ENODEV;
 }
 
 void