iio: pressure-core: st: Clean-up probe() function

This patch contains some pretty basic clean-ups in probe() pertaining to
the simplification of error handling and a couple of readability adaptions.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/pressure/st_pressure_core.c

@@ -232,21 +232,23 @@ static const struct iio_trigger_ops st_press_trigger_ops = {
 int st_press_common_probe(struct iio_dev *indio_dev,
 				struct st_sensors_platform_data *plat_data)
 {
-	int err;
 	struct st_sensor_data *pdata = iio_priv(indio_dev);
+	int irq = pdata->get_irq_data_ready(indio_dev);
+	int err;
 
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &press_info;
 
 	err = st_sensors_check_device_support(indio_dev,
-				ARRAY_SIZE(st_press_sensors), st_press_sensors);
+					      ARRAY_SIZE(st_press_sensors),
+					      st_press_sensors);
 	if (err < 0)
-		goto st_press_common_probe_error;
+		return err;
 
 	pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
-	pdata->multiread_bit = pdata->sensor->multi_read_bit;
-	indio_dev->channels = pdata->sensor->ch;
-	indio_dev->num_channels = pdata->sensor->num_ch;
+	pdata->multiread_bit     = pdata->sensor->multi_read_bit;
+	indio_dev->channels      = pdata->sensor->ch;
+	indio_dev->num_channels  = pdata->sensor->num_ch;
 
 	if (pdata->sensor->fs.addr != 0)
 		pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
@@ -261,15 +263,15 @@ int st_press_common_probe(struct iio_dev *indio_dev,
 
 	err = st_sensors_init_sensor(indio_dev, plat_data);
 	if (err < 0)
-		goto st_press_common_probe_error;
+		return err;
 
-	if (pdata->get_irq_data_ready(indio_dev) > 0) {
+	if (irq > 0) {
 		err = st_press_allocate_ring(indio_dev);
 		if (err < 0)
-			goto st_press_common_probe_error;
+			return err;
 
 		err = st_sensors_allocate_trigger(indio_dev,
-							ST_PRESS_TRIGGER_OPS);
+						  ST_PRESS_TRIGGER_OPS);
 		if (err < 0)
 			goto st_press_probe_trigger_error;
 	}
@@ -281,12 +283,12 @@ int st_press_common_probe(struct iio_dev *indio_dev,
 	return err;
 
 st_press_device_register_error:
-	if (pdata->get_irq_data_ready(indio_dev) > 0)
+	if (irq > 0)
 		st_sensors_deallocate_trigger(indio_dev);
 st_press_probe_trigger_error:
-	if (pdata->get_irq_data_ready(indio_dev) > 0)
+	if (irq > 0)
 		st_press_deallocate_ring(indio_dev);
-st_press_common_probe_error:
+
 	return err;
 }
 EXPORT_SYMBOL(st_press_common_probe);