4.17-stable review patch. If anyone has any objections, please let me know.
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From: ??? kt.liao@emc.com.tw
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@emc.com.tw Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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)