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Input: elantech - fix V4 report decoding for module with middle key

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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>
This commit is contained in:
??? 2018-06-21 17:15:32 -07:00 committed by Greg Kroah-Hartman
parent 524a0c6f2e
commit 3d1de95138
1 changed files with 1 additions and 1 deletions

2
drivers/input/mouse/elantech.c

@ -804,7 +804,7 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
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)