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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
index c526d536409f..a70d1b7e397b 100644
--- 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;
 }