Commit 11218226 authored by Hartmut Knaack's avatar Hartmut Knaack Committed by Jonathan Cameron
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iio:accel:mma8452: check values to be written 



Check values to be written to the device for valid lower and upper bounds.

Signed-off-by: default avatarHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent b9fddcdb

drivers/iio/accel/mma8452.c

+5 −3
Original line number Diff line number Diff line
@@ -471,15 +471,17 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev, 


	switch (info) {

	case IIO_EV_INFO_VALUE:

		return mma8452_change_config(data, MMA8452_TRANSIENT_THS,

					     val & MMA8452_TRANSIENT_THS_MASK);

		if (val < 0 || val > MMA8452_TRANSIENT_THS_MASK)

			return -EINVAL;



		return mma8452_change_config(data, MMA8452_TRANSIENT_THS, val);



	case IIO_EV_INFO_PERIOD:

		steps = (val * USEC_PER_SEC + val2) /

				mma8452_transient_time_step_us[

					mma8452_get_odr_index(data)];



		if (steps > 0xff)

		if (steps < 0 || steps > 0xff)

			return -EINVAL;



		return mma8452_change_config(data, MMA8452_TRANSIENT_COUNT,