The `input_mt_get_slot_by_key` function may return a negative value if an error occurs (e.g. running out of slots). If this occurs we should really avoid reporting any data for the slot. Signed-off-by: Ping Cheng <ping.cheng@xxxxxxxxx> Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx> --- drivers/hid/wacom_wac.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 27587070a192..ce9e8e9b48b6 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2551,6 +2551,9 @@ static void wacom_wac_finger_slot(struct wacom_wac *wacom_wac, int slot; slot = input_mt_get_slot_by_key(input, hid_data->id); + if (slot < 0) + return; + input_mt_slot(input, slot); input_mt_report_slot_state(input, MT_TOOL_FINGER, prox); } -- 2.32.0
