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SubjectRe: [PATCH] iio: cros_ec: Remove replacing error code with -EIO
On Sun, 21 Jul 2019 18:40:09 +0100
Jonathan Cameron <jic23@kernel.org> wrote:

> On Thu, 18 Jul 2019 15:22:37 -0700
> Gwendal Grignou <gwendal@chromium.org> wrote:
>
> > Due to an API misread, error code can be different for -EIO when reading
> > a sysfs entry. Return the error reported by the cros_ec stack.
> >
> > Check the proper error message (protocol error, not supported) is
> > reported when there is an error returned by the EC stack.
> >
> > Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
> Hi Gwendal,
>
> If you are going to send a series of small patches for a driver
> and they will inherently cause fuzz for each other, please just
> have a small series called something like "misc fixes".
>
> I clearly applied these in a different order to you, so needed
> a bit of fixing up. I think I got it right, but please check.
>
> Applied to the togreg branch of iio.git and pushed out as testing
> for the autobuilders to play with it.

I did mess this up it seems, but only noticed on a later series.

I just fixed it up, but one case failed to get converted.

Thanks,

Jonathan

>
> Thanks,
>
> Jonathan
>
> > ---
> >
> > .../cros_ec_sensors/cros_ec_sensors_core.c | 44 +++++++++++--------
> > drivers/iio/light/cros_ec_light_prox.c | 36 +++++++--------
> > drivers/iio/pressure/cros_ec_baro.c | 17 ++++---
> > 3 files changed, 51 insertions(+), 46 deletions(-)
> >
> > diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > index 130362ca421b..ed29ac22dff8 100644
> > --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > @@ -33,6 +33,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> > struct cros_ec_sensors_core_state *state = iio_priv(indio_dev);
> > struct cros_ec_dev *ec = dev_get_drvdata(pdev->dev.parent);
> > struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
> > + int ret;
> >
> > platform_set_drvdata(pdev, indio_dev);
> >
> > @@ -60,9 +61,10 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> >
> > state->param.cmd = MOTIONSENSE_CMD_INFO;
> > state->param.info.sensor_num = sensor_platform->sensor_num;
> > - if (cros_ec_motion_send_host_cmd(state, 0)) {
> > + ret = cros_ec_motion_send_host_cmd(state, 0);
> > + if (ret) {
> > dev_warn(dev, "Can not access sensor info\n");
> > - return -EIO;
> > + return ret;
> > }
> > state->type = state->resp->info.type;
> > state->loc = state->resp->info.location;
> > @@ -86,7 +88,7 @@ int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *state,
> >
> > ret = cros_ec_cmd_xfer_status(state->ec, state->msg);
> > if (ret < 0)
> > - return -EIO;
> > + return ret;
> >
> > if (ret &&
> > state->resp != (struct ec_response_motion_sense *)state->msg->data)
> > @@ -396,7 +398,7 @@ int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
> > struct iio_chan_spec const *chan,
> > int *val, int *val2, long mask)
> > {
> > - int ret = IIO_VAL_INT;
> > + int ret;
> >
> > switch (mask) {
> > case IIO_CHAN_INFO_SAMP_FREQ:
> > @@ -404,22 +406,27 @@ int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
> > st->param.ec_rate.data =
> > EC_MOTION_SENSE_NO_VALUE;
> >
> > - if (cros_ec_motion_send_host_cmd(st, 0))
> > - ret = -EIO;
> > - else
> > - *val = st->resp->ec_rate.ret;
> > + ret = cros_ec_motion_send_host_cmd(st, 0);
> > + if (ret)
> > + break;
> > +
> > + *val = st->resp->ec_rate.ret;
> > + ret = IIO_VAL_INT;
> > break;
> > case IIO_CHAN_INFO_FREQUENCY:
> > st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
> > st->param.sensor_odr.data =
> > EC_MOTION_SENSE_NO_VALUE;
> >
> > - if (cros_ec_motion_send_host_cmd(st, 0))
> > - ret = -EIO;
> > - else
> > - *val = st->resp->sensor_odr.ret;
> > + ret = cros_ec_motion_send_host_cmd(st, 0);
> > + if (ret)
> > + break;
> > +
> > + *val = st->resp->sensor_odr.ret;
> > + ret = IIO_VAL_INT;
> > break;
> > default:
> > + ret = -EINVAL;
> > break;
> > }
> >
> > @@ -431,7 +438,7 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
> > struct iio_chan_spec const *chan,
> > int val, int val2, long mask)
> > {
> > - int ret = 0;
> > + int ret;
> >
> > switch (mask) {
> > case IIO_CHAN_INFO_FREQUENCY:
> > @@ -441,17 +448,16 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
> > /* Always roundup, so caller gets at least what it asks for. */
> > st->param.sensor_odr.roundup = 1;
> >
> > - if (cros_ec_motion_send_host_cmd(st, 0))
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(st, 0);
> > break;
> > case IIO_CHAN_INFO_SAMP_FREQ:
> > st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
> > st->param.ec_rate.data = val;
> >
> > - if (cros_ec_motion_send_host_cmd(st, 0))
> > - ret = -EIO;
> > - else
> > - st->curr_sampl_freq = val;
> > + ret = cros_ec_motion_send_host_cmd(st, 0);
> > + if (ret)
> > + break;
> > + st->curr_sampl_freq = val;
> > break;
> > default:
> > ret = -EINVAL;
> > diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
> > index 308ee6ff2e22..943fa305af91 100644
> > --- a/drivers/iio/light/cros_ec_light_prox.c
> > +++ b/drivers/iio/light/cros_ec_light_prox.c
> > @@ -42,7 +42,7 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
> > u16 data = 0;
> > s64 val64;
> > - int ret = IIO_VAL_INT;
> > + int ret;
> > int idx = chan->scan_index;
> >
> > mutex_lock(&st->core.cmd_lock);
> > @@ -50,23 +50,22 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > switch (mask) {
> > case IIO_CHAN_INFO_RAW:
> > if (chan->type == IIO_PROXIMITY) {
> > - if (cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > - (s16 *)&data) < 0) {
> > - ret = -EIO;
> > + ret = cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > + (s16 *)&data);
> > + if (ret)
> > break;
> > - }
> > *val = data;
> > + ret = IIO_VAL_INT;
> > } else {
> > ret = -EINVAL;
> > }
> > break;
> > case IIO_CHAN_INFO_PROCESSED:
> > if (chan->type == IIO_LIGHT) {
> > - if (cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > - (s16 *)&data) < 0) {
> > - ret = -EIO;
> > + ret = cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > + (s16 *)&data);
> > + if (ret)
> > break;
> > - }
> > /*
> > * The data coming from the light sensor is
> > * pre-processed and represents the ambient light
> > @@ -82,15 +81,15 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
> > st->core.param.sensor_offset.flags = 0;
> >
> > - if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + if (ret)
> > break;
> > - }
> >
> > /* Save values */
> > st->core.calib[0] = st->core.resp->sensor_offset.offset[0];
> >
> > *val = st->core.calib[idx];
> > + ret = IIO_VAL_INT;
> > break;
> > case IIO_CHAN_INFO_CALIBSCALE:
> > /*
> > @@ -101,10 +100,9 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
> > st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
> >
> > - if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + if (ret)
> > break;
> > - }
> >
> > val64 = st->core.resp->sensor_range.ret;
> > *val = val64 >> 16;
> > @@ -127,7 +125,7 @@ static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
> > int val, int val2, long mask)
> > {
> > struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
> > - int ret = 0;
> > + int ret;
> > int idx = chan->scan_index;
> >
> > mutex_lock(&st->core.cmd_lock);
> > @@ -141,14 +139,12 @@ static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
> > st->core.param.sensor_offset.offset[0] = st->core.calib[0];
> > st->core.param.sensor_offset.temp =
> > EC_MOTION_SENSE_INVALID_CALIB_TEMP;
> > - if (cros_ec_motion_send_host_cmd(&st->core, 0))
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > break;
> > case IIO_CHAN_INFO_CALIBSCALE:
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
> > st->core.param.sensor_range.data = (val << 16) | (val2 / 100);
> > - if (cros_ec_motion_send_host_cmd(&st->core, 0))
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > break;
> > default:
> > ret = cros_ec_sensors_core_write(&st->core, chan, val, val2,
> > diff --git a/drivers/iio/pressure/cros_ec_baro.c b/drivers/iio/pressure/cros_ec_baro.c
> > index 034ce98d6e97..a648582b14a7 100644
> > --- a/drivers/iio/pressure/cros_ec_baro.c
> > +++ b/drivers/iio/pressure/cros_ec_baro.c
> > @@ -39,26 +39,29 @@ static int cros_ec_baro_read(struct iio_dev *indio_dev,
> > {
> > struct cros_ec_baro_state *st = iio_priv(indio_dev);
> > u16 data = 0;
> > - int ret = IIO_VAL_INT;
> > + int ret;
> > int idx = chan->scan_index;
> >
> > mutex_lock(&st->core.cmd_lock);
> >
> > switch (mask) {
> > case IIO_CHAN_INFO_RAW:
> > - if (cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > - (s16 *)&data) < 0)
> > - ret = -EIO;
> > + ret = cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > + (s16 *)&data);
> > + if (ret)
> > + break;
> > +
> > *val = data;
> > + ret = IIO_VAL_INT;
> > break;
> > case IIO_CHAN_INFO_SCALE:
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
> > st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
> >
> > - if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
> > - ret = -EIO;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + if (ret)
> > break;
> > - }
> > +
> > *val = st->core.resp->sensor_range.ret;
> >
> > /* scale * in_pressure_raw --> kPa */
>

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