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staging:iio:adis16260: Add value range check for calibscale/-bias

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Instead of just cutting of the upper bits of the value make sure that the value
is in the valid range and return an error if it is not.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-07-17 15:44:00 +01:00 committed by Jonathan Cameron
parent 988c79a95e
commit f4f87d0411
1 changed files with 9 additions and 6 deletions
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15
drivers/staging/iio/gyro/adis16260_core.c
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@ -311,18 +311,21 @@ static int adis16260_write_raw(struct iio_dev *indio_dev,
long mask)
{
struct adis *adis = iio_priv(indio_dev);
int bits = 12;
s16 val16;
u8 addr;
switch (mask) {
case IIO_CHAN_INFO_CALIBBIAS:
val16 = val & ((1 << bits) - 1);
if (val < -2048 || val >= 2048)
return -EINVAL;
addr = adis16260_addresses[chan->scan_index][0];
return adis_write_reg_16(adis, addr, val16);
return adis_write_reg_16(adis, addr, val);
case IIO_CHAN_INFO_CALIBSCALE:
val16 = val & ((1 << bits) - 1);
if (val < 0 || val >= 4096)
return -EINVAL;
addr = adis16260_addresses[chan->scan_index][1];
return adis_write_reg_16(adis, addr, val16);
return adis_write_reg_16(adis, addr, val);
}
return -EINVAL;
}