From: Sebastien Royen Date: Sun, 31 Mar 2013 07:24:13 +0000 (-0700) Subject: Input: mma8450 - fix signed 12bits to 32bits conversion X-Git-Tag: firefly_0821_release~176^2~541^2~278^2~15 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=257a1ec603538036a2f2ae7e8433d775b7a7588a;p=firefly-linux-kernel-4.4.55.git Input: mma8450 - fix signed 12bits to 32bits conversion Event value is wrong. Should be in range -2048 to 2047, but is in range 0 to 4095. Use s8 to int conversion and remove 0xfff mask. Signed-off-by: Sebastien Royen Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/misc/mma8450.c b/drivers/input/misc/mma8450.c index 480557f14f23..f3309696d053 100644 --- a/drivers/input/misc/mma8450.c +++ b/drivers/input/misc/mma8450.c @@ -123,9 +123,9 @@ static void mma8450_poll(struct input_polled_dev *dev) if (ret < 0) return; - x = ((buf[1] << 4) & 0xff0) | (buf[0] & 0xf); - y = ((buf[3] << 4) & 0xff0) | (buf[2] & 0xf); - z = ((buf[5] << 4) & 0xff0) | (buf[4] & 0xf); + x = ((int)(s8)buf[1] << 4) | (buf[0] & 0xf); + y = ((int)(s8)buf[3] << 4) | (buf[2] & 0xf); + z = ((int)(s8)buf[5] << 4) | (buf[4] & 0xf); input_report_abs(dev->input, ABS_X, x); input_report_abs(dev->input, ABS_Y, y);