drm/nouveau/hwmon: don't require therm to be valid to get any data

Signed-off-by: NKarol Herbst <nouveau@karolherbst.de>
Reviewed-by: NMartin Peres <martin.peres@free.fr>

drivers/gpu/drm/nouveau/nouveau_hwmon.c

@@ -640,9 +640,6 @@ nouveau_hwmon_init(struct drm_device *dev)
 		return -ENOMEM;
 	hwmon->dev = dev;
 
-	if (!therm || !therm->attr_get || !therm->attr_set)
-		return -ENODEV;
-
 	hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 	if (IS_ERR(hwmon_dev)) {
 		ret = PTR_ERR(hwmon_dev);
@@ -656,6 +653,7 @@ nouveau_hwmon_init(struct drm_device *dev)
 	if (ret)
 		goto error;
 
+	if (therm && therm->attr_get && therm->attr_set) {
 		/* if the card has a working thermal sensor */
 		if (nvkm_therm_temp_get(therm) >= 0) {
 			ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_temp_attrgroup);
@@ -673,9 +671,10 @@ nouveau_hwmon_init(struct drm_device *dev)
 			if (ret)
 				goto error;
 		}
+	}
 
 	/* if the card can read the fan rpm */
-	if (nvkm_therm_fan_sense(therm) >= 0) {
+	if (therm && nvkm_therm_fan_sense(therm) >= 0) {
 		ret = sysfs_create_group(&hwmon_dev->kobj,
 					 &hwmon_fan_rpm_attrgroup);
 		if (ret)