Input: wacom - report id 3 returns 4 bytes of data

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 9879c73ee517f2a4d3aec3f9c9bb1ce2b1fb5cb5..d27c9d91630b8d4fbe676e83353d5ee71d71c771 100644 (file)
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -320,23 +320,25 @@ static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_feat
        int limit = 0, report_id = 2;
        int error = -ENOMEM;
 
-       rep_data = kmalloc(2, GFP_KERNEL);
+       rep_data = kmalloc(4, GFP_KERNEL);
        if (!rep_data)
                return error;
 
-       /* ask to report tablet data if it is 2FGT Tablet PC or
+       /* ask to report tablet data if it is MT Tablet PC or
         * not a Tablet PC */
        if (features->type == TABLETPC2FG) {
                do {
                        rep_data[0] = 3;
                        rep_data[1] = 4;
+                       rep_data[2] = 0;
+                       rep_data[3] = 0;
                        report_id = 3;
                        error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
-                               report_id, rep_data, 2);
+                               report_id, rep_data, 4);
                        if (error >= 0)
                                error = usb_get_report(intf,
                                        WAC_HID_FEATURE_REPORT, report_id,
-                                       rep_data, 3);
+                                       rep_data, 4);
                } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
        } else if (features->type != TABLETPC) {
                do {