[PATCH] drm/nouveau/hwmon: Uninitialized variables in sysfs

[Dan Carpenter]

kstrtol() and friends can return -EINVAL or -ERANGE.  We have to test
for both, otherwise the value is possibly uninitialized.  Also in some
of these files we accidentally return "count" on error instead of a
negative error code.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 7c965648df80..5e75af91c446 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -68,9 +68,11 @@ nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
 	long value;
+	int ret;
 
-	if (kstrtol(buf, 10, &value) == -EINVAL)
-		return count;
+	ret = kstrtol(buf, 10, &value);
+	if (ret)
+		return ret;
 
 	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST,
 			value / 1000);
@@ -101,9 +103,11 @@ nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
 	long value;
+	int ret;
 
-	if (kstrtol(buf, 10, &value) == -EINVAL)
-		return count;
+	ret = kstrtol(buf, 10, &value);
+	if (ret)
+		return ret;
 
 	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST,
 			value / 1000);
@@ -156,8 +160,9 @@ nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
 	long value;
 	int ret;
 
-	if (kstrtol(buf, 10, &value) == -EINVAL)
-		return -EINVAL;
+	ret = kstrtol(buf, 10, &value);
+	if (ret)
+		return ret;
 
 	ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value);
 	if (ret < 0)
@@ -179,8 +184,9 @@ nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
 	long value;
 	int ret;
 
-	if (kstrtol(buf, 10, &value) == -EINVAL)
-		return -EINVAL;
+	ret = kstrtol(buf, 10, &value);
+	if (ret)
+		return ret;
 
 	ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value);
 	if (ret < 0)