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If the pressure has no unit do not calculate resolution. Signed-off-by: Angela Czubak Co-developed-by: Jonathan Denose Signed-off-by: Jonathan Denose --- drivers/hid/hid-input.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index d42c1fbd20a1cc01c04f93cf10f1d1c18043929c..1d59787bd0c0e251698e2a2944d= ae1c4a96adefe 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -303,6 +303,19 @@ __s32 hidinput_calc_abs_res(const struct hid_field *fi= eld, __u16 code) } break; =20 + case ABS_PRESSURE: + case ABS_MT_PRESSURE: + if (field->unit =3D=3D HID_UNIT_NEWTON) { + /* Convert to grams, 1 newton is 101.97 grams */ + prev =3D physical_extents; + physical_extents *=3D 10197; + if (physical_extents < prev) + return 0; + unit_exponent -=3D 2; + } else if (field->unit !=3D HID_UNIT_GRAM) { + return 0; + } + break; default: return 0; } --=20 2.50.1.565.gc32cd1483b-goog