For some reason my DualShock 4 get the calibration data values equal: gyro_pitch_plus == gyro_pitch_minus Probably due to some defect in the DS4 hardware, and cause a CPU division exception to crash the linux kernel. At least with the patch, I can continue play Retroarch without using the Gyroscope :) Signed-off-by: Henry Castro <hcvcastro@xxxxxxxxx> --- >> Hm, I'm not the biggest fan. Is this an official DS4 or a clone >> device? It sounds like it is some type of clone (some look real). Sorry it happens in my DS4 clone: I have the log values: gyro_pitch_plus = 8704 giro_pitch_minus = 8704 Then the division exception: mult_frac(x, y, 0) drivers/hid/hid-sony.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 87b538656f64..656caa07b25f 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -1823,6 +1823,15 @@ static int dualshock4_get_calibration_data(struct sony_sc *sc) acc_z_plus = get_unaligned_le16(&buf[31]); acc_z_minus = get_unaligned_le16(&buf[33]); + if (gyro_pitch_plus == gyro_pitch_minus) + gyro_pitch_minus *= -1; + + if (gyro_yaw_plus == gyro_yaw_minus) + gyro_yaw_minus *= -1; + + if (gyro_roll_plus == gyro_roll_minus) + gyro_roll_minus *= -1; + /* Set gyroscope calibration and normalization parameters. * Data values will be normalized to 1/DS4_GYRO_RES_PER_DEG_S degree/s. */ -- 2.20.1
