> Driver was checking for direct mode but not locking it. Use
> claim/release helper functions to guarantee the device stays
> in direct mode during raw writes.
looks good,
Acked-by: Peter Meerwald-Stadler <pme...@pmeerw.net>
> Signed-off-by: Alison Schofield <amsfiel...@gmail.com>
> ---
> drivers/iio/magnetometer/mag3110.c | 30 ++++++++++++++++++++----------
> 1 file changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/iio/magnetometer/mag3110.c
> b/drivers/iio/magnetometer/mag3110.c
> index f2b3bd7..b4f643f 100644
> --- a/drivers/iio/magnetometer/mag3110.c
> +++ b/drivers/iio/magnetometer/mag3110.c
> @@ -222,29 +222,39 @@ static int mag3110_write_raw(struct iio_dev *indio_dev,
> int val, int val2, long mask)
> {
> struct mag3110_data *data = iio_priv(indio_dev);
> - int rate;
> + int rate, ret;
>
> - if (iio_buffer_enabled(indio_dev))
> - return -EBUSY;
> + ret = iio_device_claim_direct_mode(indio_dev);
> + if (ret)
> + return ret;
>
> switch (mask) {
> case IIO_CHAN_INFO_SAMP_FREQ:
> rate = mag3110_get_samp_freq_index(data, val, val2);
> - if (rate < 0)
> - return -EINVAL;
> + if (rate < 0) {
> + ret = -EINVAL;
> + break;
> + }
>
> data->ctrl_reg1 &= ~MAG3110_CTRL_DR_MASK;
> data->ctrl_reg1 |= rate << MAG3110_CTRL_DR_SHIFT;
> - return i2c_smbus_write_byte_data(data->client,
> + ret = i2c_smbus_write_byte_data(data->client,
> MAG3110_CTRL_REG1, data->ctrl_reg1);
> + break;
> case IIO_CHAN_INFO_CALIBBIAS:
> - if (val < -10000 || val > 10000)
> - return -EINVAL;
> - return i2c_smbus_write_word_swapped(data->client,
> + if (val < -10000 || val > 10000) {
> + ret = -EINVAL;
> + break;
> + }
> + ret = i2c_smbus_write_word_swapped(data->client,
> MAG3110_OFF_X + 2 * chan->scan_index, val << 1);
> + break;
> default:
> - return -EINVAL;
> + ret = -EINVAL;
> + break;
> }
> + iio_device_release_direct_mode(indio_dev);
> + return ret;
> }
>
> static irqreturn_t mag3110_trigger_handler(int irq, void *p)
>
--
Peter Meerwald-Stadler
+43-664-2444418 (mobile)
