drm/nv40/therm: reserve negative temperatures for errors

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

diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
index c526d53..a70d1b7 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
@@ -102,6 +102,10 @@ nv40_temp_get(struct nouveau_therm *therm)
        core_temp = core_temp + sensor->offset_num / sensor->offset_den;
        core_temp = core_temp + sensor->offset_constant - 8;
 
+       /* reserve negative temperatures for errors */
+       if (core_temp < 0)
+               core_temp = 0;
+
        return core_temp;
 }