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Date: Sun, 21 Jul 2019 18:40:09 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Gwendal Grignou <gwendal@...omium.org>
Cc: Enric Balletbo i Serra <enric.balletbo@...labora.com>,
linux-iio@...r.kernel.org, Hartmut Knaack <knaack.h@....de>,
Guenter Roeck <groeck@...omium.org>,
Fabien Lahoudere <fabien.lahoudere@...labora.com>,
Benson Leung <bleung@...omium.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: cros_ec: Remove replacing error code with -EIO
On Thu, 18 Jul 2019 15:22:37 -0700
Gwendal Grignou <gwendal@...omium.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@...omium.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.
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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