Check the validity of the sampling frequency set by user.
Signed-off-by: Song Hongyan <hongyan.song@xxxxxxxxx>
---
drivers/iio/common/hid-sensors/hid-sensor-attributes.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
index ad30814..408c16e 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
@@ -221,12 +221,26 @@ int hid_sensor_read_max_samp_freq_value(struct hid_sensor_common *st,
int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
int val1, int val2)
{
+ int max_freq_int, max_freq_dec;
s32 value;
int ret;
if (val1 < 0 || val2 < 0)
ret = -EINVAL;
+ ret = hid_sensor_read_max_samp_freq_value(st, &max_freq_int,
+ &max_freq_dec);
+ if (ret >= 0) {
+ /*
+ * check whether the input sample freqency value is larger than
+ * the max_freq_value.
+ */
+ if (val1 > max_freq_int || (val1 == max_freq_int &&
+ val2 > max_freq_dec))
+ return -EINVAL;
+ } else {
+ hid_info(st->hsdev->hdev, "No max_sample_frequency!!!\n");
+ }
value = val1 * pow_10(6) + val2;
if (value) {
if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND)
--
1.9.1
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