[PATCH 10/24] platform/x86: ideapad-laptop: misc. device attribute changes

["Barnabás Pőcze" <pobrn@protonmail.com>]

Do not handle zero length buffer separately. Use kstrtouint() instead
of sscanf().

Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index b6b5a508a8b8..a615c42d1beb 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -363,13 +363,13 @@ static ssize_t store_ideapad_cam(struct device *dev,
 				 struct device_attribute *attr,
 				 const char *buf, size_t count)
 {
-	int ret, state;
+	int ret;
 	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned int state;
 
-	if (!count)
-		return 0;
-	if (sscanf(buf, "%i", &state) != 1)
-		return -EINVAL;
+	ret = kstrtouint(buf, 0, &state);
+	if (ret)
+		return ret;
 	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 	if (ret)
 		return ret;
@@ -396,14 +396,14 @@ static ssize_t store_ideapad_fan(struct device *dev,
 				 struct device_attribute *attr,
 				 const char *buf, size_t count)
 {
-	int ret, state;
+	int ret;
 	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned int state;
 
-	if (!count)
-		return 0;
-	if (sscanf(buf, "%i", &state) != 1)
-		return -EINVAL;
-	if (state < 0 || state > 4 || state == 3)
+	ret = kstrtouint(buf, 0, &state);
+	if (ret)
+		return ret;
+	if (state > 4 || state == 3)
 		return -EINVAL;
 	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 	if (ret)
-- 
2.29.2