[Nouveau] [PATCH] drm/nouveau/therm/gp100: Do not report temperature when subdev is shadowed

[Tobias Klausmann]

This fixes wrong temperature outputs e.g. 511°C if the card is asleep.

Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann at mni.thm.de>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/therm/gp100.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gp100.c
index 9f0dea3f61dc..45d0ec632b5a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gp100.c
@@ -32,8 +32,10 @@ gp100_temp_get(struct nvkm_therm *therm)
 	u32 inttemp = (tsensor & 0x0001fff8);
 
 	/* device SHADOWed */
-	if (tsensor & 0x40000000)
+	if (tsensor & 0x40000000) {
 		nvkm_trace(subdev, "reading temperature from SHADOWed sensor\n");
+		return -ENODEV;
+	}
 
 	/* device valid */
 	if (tsensor & 0x20000000)
-- 
2.16.1