HID: Fix hid_report_len usage

Follow the change of return type u32 of hid_report_len,
fix all the types of variables those get the return value of
hid_report_len to u32, and all other code already uses u32.

Cc: stable@vger.kernel.org
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-input.c

@@ -1368,7 +1368,8 @@ static void hidinput_led_worker(struct work_struct *work)
 					      led_work);
 	struct hid_field *field;
 	struct hid_report *report;
-	int len, ret;
+	int ret;
+	u32 len;
 	__u8 *buf;
 
 	field = hidinput_get_led_field(hid);

drivers/hid/hid-multitouch.c

@@ -370,7 +370,8 @@ static const struct attribute_group mt_attribute_group = {
 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 {
 	struct mt_device *td = hid_get_drvdata(hdev);
-	int ret, size = hid_report_len(report);
+	int ret;
+	u32 size = hid_report_len(report);
 	u8 *buf;
 
 	/*
@@ -1183,7 +1184,7 @@ static void mt_set_input_mode(struct hid_device *hdev)
 	struct hid_report_enum *re;
 	struct mt_class *cls = &td->mtclass;
 	char *buf;
-	int report_len;
+	u32 report_len;
 
 	if (td->inputmode < 0)
 		return;

drivers/hid/hid-rmi.c

@@ -89,8 +89,8 @@ struct rmi_data {
 	u8 *writeReport;
 	u8 *readReport;
 
-	int input_report_size;
-	int output_report_size;
+	u32 input_report_size;
+	u32 output_report_size;
 
 	unsigned long flags;
 

drivers/hid/wacom_sys.c

@@ -219,7 +219,7 @@ static void wacom_feature_mapping(struct hid_device *hdev,
 	unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
 	u8 *data;
 	int ret;
-	int n;
+	u32 n;
 
 	switch (equivalent_usage) {
 	case HID_DG_CONTACTMAX:
@@ -519,7 +519,7 @@ static int wacom_set_device_mode(struct hid_device *hdev,
 	u8 *rep_data;
 	struct hid_report *r;
 	struct hid_report_enum *re;
-	int length;
+	u32 length;
 	int error = -ENOMEM, limit = 0;
 
 	if (wacom_wac->mode_report < 0)