[PATCH AUTOSEL for 4.4 051/101] iio: st_pressure: st_accel: Initialise sensor platform data properly

[Sasha Levin]

From: Shrirang Bagul <shrirang.ba...@canonical.com>

[ Upstream commit 7383d44b84c94aaca4bf695a6bd8a69f2295ef1a ]

This patch fixes the sensor platform data initialisation for st_pressure
and st_accel device drivers. Without this patch, the driver fails to
register the sensors when the user removes and re-loads the driver.

1. Unload the kernel modules for st_pressure
$ sudo rmmod st_pressure_i2c
$ sudo rmmod st_pressure

2. Re-load the driver
$ sudo insmod st_pressure
$ sudo insmod st_pressure_i2c

Signed-off-by: Jonathan Cameron <ji...@kernel.org>
Acked-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/iio/accel/st_accel_core.c       | 7 ++++---
 drivers/iio/pressure/st_pressure_core.c | 8 ++++----
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/accel/st_accel_core.c 
b/drivers/iio/accel/st_accel_core.c
index 197a08b4e2f3..84ab20c6b389 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -628,6 +628,8 @@ static const struct iio_trigger_ops st_accel_trigger_ops = {
 int st_accel_common_probe(struct iio_dev *indio_dev)
 {
        struct st_sensor_data *adata = iio_priv(indio_dev);
+       struct st_sensors_platform_data *pdata =
+               (struct st_sensors_platform_data *)adata->dev->platform_data;
        int irq = adata->get_irq_data_ready(indio_dev);
        int err;
 
@@ -652,9 +654,8 @@ int st_accel_common_probe(struct iio_dev *indio_dev)
                                        &adata->sensor_settings->fs.fs_avl[0];
        adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
 
-       if (!adata->dev->platform_data)
-               adata->dev->platform_data =
-                       (struct st_sensors_platform_data *)&default_accel_pdata;
+       if (!pdata)
+               pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
 
        err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data);
        if (err < 0)
diff --git a/drivers/iio/pressure/st_pressure_core.c 
b/drivers/iio/pressure/st_pressure_core.c
index 5056bd68573f..270eeac928bc 100644
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -436,6 +436,8 @@ static const struct iio_trigger_ops st_press_trigger_ops = {
 int st_press_common_probe(struct iio_dev *indio_dev)
 {
        struct st_sensor_data *press_data = iio_priv(indio_dev);
+       struct st_sensors_platform_data *pdata =
+               (struct st_sensors_platform_data 
*)press_data->dev->platform_data;
        int irq = press_data->get_irq_data_ready(indio_dev);
        int err;
 
@@ -464,10 +466,8 @@ int st_press_common_probe(struct iio_dev *indio_dev)
        press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
 
        /* Some devices don't support a data ready pin. */
-       if (!press_data->dev->platform_data &&
-                               press_data->sensor_settings->drdy_irq.addr)
-               press_data->dev->platform_data =
-                       (struct st_sensors_platform_data *)&default_press_pdata;
+       if (!pdata && press_data->sensor_settings->drdy_irq.addr)
+               pdata = (struct st_sensors_platform_data *)&default_press_pdata;
 
        err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
        if (err < 0)
-- 
2.14.1