From: Linus Walleij Date: Thu, 1 Sep 2016 09:44:35 +0000 (+0200) Subject: iio: accel: kxsd9: Fix scaling bug X-Git-Tag: v4.7.5~107 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0bb3dd494eb7b04296595f5679720668055aebf;p=thirdparty%2Fkernel%2Fstable.git iio: accel: kxsd9: Fix scaling bug commit 307fe9dd11ae44d4f8881ee449a7cbac36e1f5de upstream. All the scaling of the KXSD9 involves multiplication with a fraction number < 1. However the scaling value returned from IIO_INFO_SCALE was unpredictable as only the micros of the value was assigned, and not the integer part, resulting in scaling like this: $cat in_accel_scale -1057462640.011978 Fix this by assigning zero to the integer part. Tested-by: Jonathan Cameron Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c index da5fb67ecb346..9d72d4bcf5e9b 100644 --- a/drivers/iio/accel/kxsd9.c +++ b/drivers/iio/accel/kxsd9.c @@ -166,6 +166,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev, ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C)); if (ret < 0) goto error_ret; + *val = 0; *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK]; ret = IIO_VAL_INT_PLUS_MICRO; break;