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/patch/.

This change does that.

For drivers max30100 & max30102 this helper is called after indio_dev has
been populated. This doesn't make any difference [at this point in time].

Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/iio/accel/sca3000.c                    | 18 ++----------------
 drivers/iio/accel/ssp_accel_sensor.c           | 13 ++++---------
 drivers/iio/adc/ina2xx-adc.c                   | 13 +++++--------
 drivers/iio/gyro/ssp_gyro_sensor.c             | 13 ++++---------
 drivers/iio/health/max30100.c                  | 15 ++++++---------
 drivers/iio/health/max30102.c                  | 15 ++++++---------
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 17 +++++++----------
 drivers/iio/light/acpi-als.c                   | 11 +++++------
 drivers/iio/light/apds9960.c                   | 15 ++++++---------
 9 files changed, 45 insertions(+), 85 deletions(-)

diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index 66d768d971e1..a0db76082ba6 100644
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -1272,20 +1272,6 @@ static int sca3000_write_event_config(struct iio_dev 
*indio_dev,
        return ret;
 }
 
-static int sca3000_configure_ring(struct iio_dev *indio_dev)
-{
-       struct iio_buffer *buffer;
-
-       buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
-       if (!buffer)
-               return -ENOMEM;
-
-       iio_device_attach_buffer(indio_dev, buffer);
-       indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
-
-       return 0;
-}
-
 static inline
 int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
 {
@@ -1480,7 +1466,8 @@ static int sca3000_probe(struct spi_device *spi)
        }
        indio_dev->modes = INDIO_DIRECT_MODE;
 
-       ret = sca3000_configure_ring(indio_dev);
+       ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+                                            &sca3000_ring_setup_ops);
        if (ret)
                return ret;
 
@@ -1494,7 +1481,6 @@ static int sca3000_probe(struct spi_device *spi)
                if (ret)
                        return ret;
        }
-       indio_dev->setup_ops = &sca3000_ring_setup_ops;
        ret = sca3000_clean_setup(st);
        if (ret)
                goto error_free_irq;
diff --git a/drivers/iio/accel/ssp_accel_sensor.c 
b/drivers/iio/accel/ssp_accel_sensor.c
index c32647abce20..1d9971db949d 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)
@@ -111,18 +110,14 @@ static int ssp_accel_probe(struct platform_device *pdev)
        indio_dev->dev.parent = &pdev->dev;
        indio_dev->dev.of_node = pdev->dev.of_node;
        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 = iio_device_attach_kfifo_buffer(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 bdd7cba6f6b0..2070809e1acc 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -950,7 +950,6 @@ 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;
@@ -1014,7 +1013,7 @@ 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;
        indio_dev->dev.parent = &client->dev;
        indio_dev->dev.of_node = client->dev.of_node;
        if (id->driver_data == ina226) {
@@ -1027,13 +1026,11 @@ 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 = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+                                            &ina2xx_setup_ops);
+       if (ret)
+               return ret;
 
        return iio_device_register(indio_dev);
 }
diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c 
b/drivers/iio/gyro/ssp_gyro_sensor.c
index 4e4ee4167544..c12d3db5a951 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)
@@ -110,18 +109,14 @@ static int ssp_gyro_probe(struct platform_device *pdev)
        indio_dev->name = ssp_gyro_name;
        indio_dev->dev.parent = &pdev->dev;
        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 = iio_device_attach_kfifo_buffer(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 546fc37ad75d..f4e9866f4c3d 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;
 
@@ -426,21 +425,19 @@ 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;
        indio_dev->dev.parent = &client->dev;
 
+       ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+                                            &max30100_buffer_setup_ops);
+       if (ret)
+               return ret;
+
        data = iio_priv(indio_dev);
        data->indio_dev = indio_dev;
        data->client = client;
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index 74fc260b957e..e15126d23dfb 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -507,7 +507,6 @@ 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;
@@ -516,16 +515,9 @@ 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;
        indio_dev->dev.parent = &client->dev;
 
        data = iio_priv(indio_dev);
@@ -551,6 +543,11 @@ static int max30102_probe(struct i2c_client *client,
                return -ENODEV;
        }
 
+       ret = iio_device_attach_kfifo_buffer(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/st_lsm6dsx/st_lsm6dsx_buffer.c 
b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index bb899345f2bb..4ba3d5551570 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -30,8 +30,8 @@
  * Denis Ciocca <denis.cio...@st.com>
  */
 #include <linux/module.h>
-#include <linux/iio/kfifo_buf.h>
 #include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
 #include <linux/iio/buffer.h>
 #include <linux/regmap.h>
 #include <linux/bitfield.h>
@@ -713,20 +713,17 @@ 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 = iio_device_attach_kfifo_buffer(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 1eafd0b24e18..ea99705c3387 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -166,6 +166,7 @@ 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)
@@ -180,15 +181,13 @@ static int acpi_als_add(struct acpi_device *device)
        indio_dev->name = ACPI_ALS_DEVICE_NAME;
        indio_dev->dev.parent = &device->dev;
        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 = iio_device_attach_kfifo_buffer(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 52f86bc777dd..8acc319445b6 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -987,7 +987,6 @@ 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;
 
@@ -995,20 +994,18 @@ 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->dev.parent = &client->dev;
        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 = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+                                            &apds9960_buffer_setup_ops);
+       if (ret)
+               return ret;
 
        data = iio_priv(indio_dev);
        i2c_set_clientdata(client, indio_dev);
-- 
2.17.1

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