[PATCH 3/5] iio: make use of devm_iio_kfifo_buffer_setup() helper

From: Alexandru Ardelean
Date: Sun Feb 14 2021 - 09:35:42 EST

All drivers that already call devm_iio_kfifo_allocate() &
iio_device_attach_buffer() are simple to convert to
iio_device_attach_kfifo_buffer() in a single go.

This change does that; the unwind order is preserved.
What is important, is that the devm_iio_kfifo_buffer_setup() be called
after the indio_dev->modes is assigned, to make sure that
INDIO_BUFFER_SOFTWARE flag is set and not overridden by the assignment to
indio_dev->modes.

Also, the INDIO_BUFFER_SOFTWARE has been removed from the assignments of
'indio_dev->modes' because it is set by devm_iio_kfifo_buffer_setup().

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/iio/accel/ssp_accel_sensor.c | 14 ++++-------
drivers/iio/adc/ina2xx-adc.c | 14 +++++------
drivers/iio/adc/ti_am335x_adc.c | 18 ++++-----------
.../cros_ec_sensors/cros_ec_sensors_core.c | 13 ++++-------
drivers/iio/gyro/ssp_gyro_sensor.c | 14 ++++-------
drivers/iio/health/max30100.c | 16 ++++++-------
drivers/iio/health/max30102.c | 16 ++++++-------
.../iio/imu/inv_icm42600/inv_icm42600_accel.c | 14 +++++------
.../iio/imu/inv_icm42600/inv_icm42600_gyro.c | 13 +++++------
.../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 15 +++++-------
drivers/iio/light/acpi-als.c | 12 ++++------
drivers/iio/light/apds9960.c | 16 ++++++-------
.../staging/iio/impedance-analyzer/ad5933.c | 23 ++++---------------
13 files changed, 74 insertions(+), 124 deletions(-)

diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
index 474477e91b5e..04dcb2b657ee 100644
--- a/drivers/iio/accel/ssp_accel_sensor.c
+++ b/drivers/iio/accel/ssp_accel_sensor.c
@@ -96,7 +96,6 @@ static int ssp_accel_probe(struct platform_device *pdev)
int ret;
struct iio_dev *indio_dev;
struct ssp_sensor_data *spd;
- struct iio_buffer *buffer;

indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
if (!indio_dev)
@@ -109,18 +108,15 @@ static int ssp_accel_probe(struct platform_device *pdev)

indio_dev->name = ssp_accel_device_name;
indio_dev->info = &ssp_accel_iio_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = ssp_acc_channels;
indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
indio_dev->available_scan_masks = ssp_accel_scan_mask;

- buffer = devm_iio_kfifo_allocate(&pdev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- indio_dev->setup_ops = &ssp_accel_buffer_ops;
+ ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &ssp_accel_buffer_ops);
+ if (ret)
+ return ret;

platform_set_drvdata(pdev, indio_dev);

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index b573ec60a8b8..2ae54258b221 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -953,7 +953,6 @@ static int ina2xx_probe(struct i2c_client *client,
{
struct ina2xx_chip_info *chip;
struct iio_dev *indio_dev;
- struct iio_buffer *buffer;
unsigned int val;
enum ina2xx_ids type;
int ret;
@@ -1017,7 +1016,7 @@ static int ina2xx_probe(struct i2c_client *client,
return ret;
}

- indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->modes = INDIO_DIRECT_MODE;
if (id->driver_data == ina226) {
indio_dev->channels = ina226_channels;
indio_dev->num_channels = ARRAY_SIZE(ina226_channels);
@@ -1028,13 +1027,12 @@ static int ina2xx_probe(struct i2c_client *client,
indio_dev->info = &ina219_info;
}
indio_dev->name = id->name;
- indio_dev->setup_ops = &ina2xx_setup_ops;

- buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
+ ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &ina2xx_setup_ops);
+ if (ret)
+ return ret;

return iio_device_register(indio_dev);
}
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index e946903b0993..855cc2d64ac8 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -385,24 +385,16 @@ static int tiadc_iio_buffered_hardware_setup(struct device *dev,
unsigned long flags,
const struct iio_buffer_setup_ops *setup_ops)
{
- struct iio_buffer *buffer;
int ret;

- buffer = devm_iio_kfifo_allocate(dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- ret = devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
- flags, indio_dev->name, indio_dev);
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ setup_ops);
if (ret)
return ret;

- indio_dev->setup_ops = setup_ops;
- indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
-
- return 0;
+ return devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
+ flags, indio_dev->name, indio_dev);
}

static const char * const chan_name_ain[] = {
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 c833ec0ef214..f8824afe595e 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
@@ -334,14 +334,11 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
* We can not use trigger here, as events are generated
* as soon as sample_frequency is set.
*/
- struct iio_buffer *buffer;
-
- buffer = devm_iio_kfifo_allocate(dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ NULL);
+ if (ret)
+ return ret;

ret = cros_ec_sensorhub_register_push_data(
sensor_hub, sensor_platform->sensor_num,
diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c
index ac7c170a20de..46ed12771d2f 100644
--- a/drivers/iio/gyro/ssp_gyro_sensor.c
+++ b/drivers/iio/gyro/ssp_gyro_sensor.c
@@ -96,7 +96,6 @@ static int ssp_gyro_probe(struct platform_device *pdev)
int ret;
struct iio_dev *indio_dev;
struct ssp_sensor_data *spd;
- struct iio_buffer *buffer;

indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
if (!indio_dev)
@@ -109,18 +108,15 @@ static int ssp_gyro_probe(struct platform_device *pdev)

indio_dev->name = ssp_gyro_name;
indio_dev->info = &ssp_gyro_iio_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = ssp_gyro_channels;
indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
indio_dev->available_scan_masks = ssp_gyro_scan_mask;

- buffer = devm_iio_kfifo_allocate(&pdev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- indio_dev->setup_ops = &ssp_gyro_buffer_ops;
+ ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &ssp_gyro_buffer_ops);
+ if (ret)
+ return ret;

platform_set_drvdata(pdev, indio_dev);

diff --git a/drivers/iio/health/max30100.c b/drivers/iio/health/max30100.c
index 38aa2030f3c6..36ba7611d9ce 100644
--- a/drivers/iio/health/max30100.c
+++ b/drivers/iio/health/max30100.c
@@ -418,7 +418,6 @@ static int max30100_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max30100_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;

@@ -426,19 +425,18 @@ static int max30100_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->name = MAX30100_DRV_NAME;
indio_dev->channels = max30100_channels;
indio_dev->info = &max30100_info;
indio_dev->num_channels = ARRAY_SIZE(max30100_channels);
indio_dev->available_scan_masks = max30100_scan_masks;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &max30100_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &max30100_buffer_setup_ops);
+ if (ret)
+ return ret;

data = iio_priv(indio_dev);
data->indio_dev = indio_dev;
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index b35557a54ee2..2292876c55e2 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -506,7 +506,6 @@ static int max30102_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max30102_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;
unsigned int reg;
@@ -515,16 +514,9 @@ static int max30102_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->name = MAX30102_DRV_NAME;
indio_dev->info = &max30102_info;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &max30102_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;

data = iio_priv(indio_dev);
data->indio_dev = indio_dev;
@@ -549,6 +541,12 @@ static int max30102_probe(struct i2c_client *client,
return -ENODEV;
}

+ ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &max30102_buffer_setup_ops);
+ if (ret)
+ return ret;
+
data->regmap = devm_regmap_init_i2c(client, &max30102_regmap_config);
if (IS_ERR(data->regmap)) {
dev_err(&client->dev, "regmap initialization failed\n");
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
index 3441b0d61c5d..383cc3250342 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
@@ -709,7 +709,6 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
const char *name;
struct inv_icm42600_timestamp *ts;
struct iio_dev *indio_dev;
- struct iio_buffer *buffer;
int ret;

name = devm_kasprintf(dev, GFP_KERNEL, "%s-accel", st->name);
@@ -720,23 +719,22 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
if (!indio_dev)
return ERR_PTR(-ENOMEM);

- buffer = devm_iio_kfifo_allocate(dev);
- if (!buffer)
- return ERR_PTR(-ENOMEM);
-
ts = iio_priv(indio_dev);
inv_icm42600_timestamp_init(ts, inv_icm42600_odr_to_period(st->conf.accel.odr));

iio_device_set_drvdata(indio_dev, st);
indio_dev->name = name;
indio_dev->info = &inv_icm42600_accel_info;
- indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = inv_icm42600_accel_channels;
indio_dev->num_channels = ARRAY_SIZE(inv_icm42600_accel_channels);
indio_dev->available_scan_masks = inv_icm42600_accel_scan_masks;
- indio_dev->setup_ops = &inv_icm42600_buffer_ops;

- iio_device_attach_buffer(indio_dev, buffer);
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &inv_icm42600_buffer_ops);
+ if (ret)
+ return ERR_PTR(ret);

ret = devm_iio_device_register(dev, indio_dev);
if (ret)
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
index aee7b9ff4bf4..cec1dd0e0464 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
@@ -720,7 +720,6 @@ struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st)
const char *name;
struct inv_icm42600_timestamp *ts;
struct iio_dev *indio_dev;
- struct iio_buffer *buffer;
int ret;

name = devm_kasprintf(dev, GFP_KERNEL, "%s-gyro", st->name);
@@ -731,23 +730,23 @@ struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st)
if (!indio_dev)
return ERR_PTR(-ENOMEM);

- buffer = devm_iio_kfifo_allocate(dev);
- if (!buffer)
- return ERR_PTR(-ENOMEM);
-
ts = iio_priv(indio_dev);
inv_icm42600_timestamp_init(ts, inv_icm42600_odr_to_period(st->conf.gyro.odr));

iio_device_set_drvdata(indio_dev, st);
indio_dev->name = name;
indio_dev->info = &inv_icm42600_gyro_info;
- indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = inv_icm42600_gyro_channels;
indio_dev->num_channels = ARRAY_SIZE(inv_icm42600_gyro_channels);
indio_dev->available_scan_masks = inv_icm42600_gyro_scan_masks;
indio_dev->setup_ops = &inv_icm42600_buffer_ops;

- iio_device_attach_buffer(indio_dev, buffer);
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &inv_icm42600_buffer_ops);
+ if (ret)
+ return ERR_PTR(ret);

ret = devm_iio_device_register(dev, indio_dev);
if (ret)
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index f1103ecedd64..16730a780964 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -739,20 +739,17 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {

int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
{
- struct iio_buffer *buffer;
- int i;
+ int i, ret;

for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
if (!hw->iio_devs[i])
continue;

- buffer = devm_iio_kfifo_allocate(hw->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(hw->iio_devs[i], buffer);
- hw->iio_devs[i]->modes |= INDIO_BUFFER_SOFTWARE;
- hw->iio_devs[i]->setup_ops = &st_lsm6dsx_buffer_ops;
+ ret = devm_iio_kfifo_buffer_setup(hw->dev, hw->iio_devs[i],
+ INDIO_BUFFER_SOFTWARE,
+ &st_lsm6dsx_buffer_ops);
+ if (ret)
+ return ret;
}

return 0;
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
index 2be7180e2cbf..f8e547fd35e7 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -165,7 +165,7 @@ static int acpi_als_add(struct acpi_device *device)
{
struct acpi_als *als;
struct iio_dev *indio_dev;
- struct iio_buffer *buffer;
+ int ret;

indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
if (!indio_dev)
@@ -179,15 +179,13 @@ static int acpi_als_add(struct acpi_device *device)

indio_dev->name = ACPI_ALS_DEVICE_NAME;
indio_dev->info = &acpi_als_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = acpi_als_channels;
indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);

- buffer = devm_iio_kfifo_allocate(&device->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
+ ret = devm_iio_kfifo_buffer_setup(&device->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE, NULL);
+ if (ret)
+ return ret;

return devm_iio_device_register(&device->dev, indio_dev);
}
diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
index df0647856e5d..4141c0fa7bc4 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -988,7 +988,6 @@ static int apds9960_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct apds9960_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;

@@ -996,19 +995,18 @@ static int apds9960_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->info = &apds9960_info;
indio_dev->name = APDS9960_DRV_NAME;
indio_dev->channels = apds9960_channels;
indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
indio_dev->available_scan_masks = apds9960_scan_masks;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &apds9960_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &apds9960_buffer_setup_ops);
+ if (ret)
+ return ret;

data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index dba78896ea8f..793918e1c45f 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -602,23 +602,6 @@ static const struct iio_buffer_setup_ops ad5933_ring_setup_ops = {
.postdisable = ad5933_ring_postdisable,
};

-static int ad5933_register_ring_funcs_and_init(struct device *dev,
- struct iio_dev *indio_dev)
-{
- struct iio_buffer *buffer;
-
- buffer = devm_iio_kfifo_allocate(dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- /* Ring buffer functions - here trigger setup related */
- indio_dev->setup_ops = &ad5933_ring_setup_ops;
-
- return 0;
-}
-
static void ad5933_work(struct work_struct *work)
{
struct ad5933_state *st = container_of(work,
@@ -761,11 +744,13 @@ static int ad5933_probe(struct i2c_client *client,

indio_dev->info = &ad5933_info;
indio_dev->name = id->name;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = ad5933_channels;
indio_dev->num_channels = ARRAY_SIZE(ad5933_channels);

- ret = ad5933_register_ring_funcs_and_init(&client->dev, indio_dev);
+ ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &ad5933_ring_setup_ops);
if (ret)
return ret;

--
2.17.1