4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: ??? <kt.liao@xxxxxxxxxx> commit e0ae2519ca004a628fa55aeef969c37edce522d3 upstream. Some touchpad has middle key and it will be indicated in bit 2 of packet[0]. We need to fix V4 formation's byte mask to prevent error decoding. Signed-off-by: KT Liao <kt.liao@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/input/mouse/elantech.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -796,7 +796,7 @@ static int elantech_packet_check_v4(stru else if (ic_version == 7 && etd->samples[1] == 0x2A) sanity_check = ((packet[3] & 0x1c) == 0x10); else - sanity_check = ((packet[0] & 0x0c) == 0x04 && + sanity_check = ((packet[0] & 0x08) == 0x00 && (packet[3] & 0x1c) == 0x10); if (!sanity_check)
