1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 164bb55064de..6b9adc7bec6e 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -799,6 +799,9 @@ static int wacom_bpt_touch(struct wacom_wac *wacom)
         unsigned char *data = wacom->data;
         int i;
 
+        if (data[0] != 0x02)
+            return 0;
+
         for (i = 0; i < 2; i++) {
                 int p = data[9 * i + 2];
                 bool touch = p && !wacom->shared->stylus_in_proximity;
@@ -875,6 +878,9 @@ static int wacom_bpt3_touch(struct wacom_wac *wacom)
         int count = data[1] & 0x03;
         int i;
 
+        if (data[0] != 0x02)
+            return 0;
+
         /* data has up to 7 fixed sized 8-byte messages starting at data[2] */
         for (i = 0; i < count; i++) {
                 int offset = (8 * i) + 2;
@@ -900,6 +906,9 @@ static int wacom_bpt_pen(struct wacom_wac *wacom)
         unsigned char *data = wacom->data;
         int prox = 0, x = 0, y = 0, p = 0, d = 0, pen = 0, btn1 = 0, btn2 = 0;
 
+        if (data[0] != 0x02)
+            return 0;
+
         prox = (data[1] & 0x20) == 0x20;
 
         /*