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Signed-off-by: KT Liao Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- drivers/input/mouse/elantech.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.= c index 51b96e9bf793..06ea28e5d7b4 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1715,6 +1715,17 @@ int elantech_init(struct psmouse *psmouse) etd->samples[0], etd->samples[1], etd->samples[2]); } =20 + if (etd->samples[1] =3D=3D 0x74 && etd->hw_version =3D=3D 0x03) { + /* + * This module has a bug which makes absolute mode + * unusable, so let's abort so we'll be using standard + * PS/2 protocol. + */ + psmouse_info(psmouse, + "absolute mode broken, forcing standard PS/2 protocol\n"); + goto init_fail; + } + if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); --=20 2.14.1