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iio: hid-sensor-attributes: Check sample_frequency/hysteresis write data legitimacy

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Neither sample frequency value nor hysteresis value can be set to be a
negative number, check and return "Invalid argument" if they are negative.

If not do this change, sample_frequency will be set into some unknown
value, read hysteresis value after write negative number will return
"Invalid argument".

Signed-off-by: Song Hongyan <[email protected]>
Acked-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
This commit is contained in:
Song Hongyan 2016-11-03 00:45:48 +00:00 • committed by Jonathan Cameron
commit ab54163190
1 changed files with 4 additions and 1 deletions
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5
drivers/iio/common/hid-sensors/hid-sensor-attributes.c
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@ -201,7 +201,7 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
int ret;
if (val1 < 0 || val2 < 0)
ret = -EINVAL;
return -EINVAL;
value = val1 * pow_10(6) + val2;
if (value) {
@ -250,6 +250,9 @@ int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st,
s32 value;
int ret;
if (val1 < 0 || val2 < 0)
return -EINVAL;
value = convert_to_vtf_format(st->sensitivity.size,
st->sensitivity.unit_expo,
val1, val2);