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Date: Thu, 28 Mar 2013 15:16:29 +0100 From: Sebastien Royen <sebastien.royen@...il.com> To: Dmitry Torokhov <dmitry.torokhov@...il.com>, Bill Pemberton <wfp5p@...ginia.edu> Cc: linux-kernel@...r.kernel.org, seb <sebastien.royen@...adeus.com> Subject: [PATCH 1/1] Input: mma8450 - fix signed 12bits to 32bits conversion From: seb <sebastien.royen@...adeus.com> 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 <sebastien.royen@...adeus.com> --- drivers/input/misc/mma8450.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/input/misc/mma8450.c b/drivers/input/misc/mma8450.c index 480557f..f330969 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); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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