diff options
| -rw-r--r-- | drivers/input/tablet/wacom_wac.c | 9 |
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; /* |