iio: chemical: scd30_core: Switch to use dev_err_probe()

Switch to use dev_err_probe() to simplify the error paths and
unify message template.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230113141917.23725-1-andriy.shevchenko@linux.intel.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/chemical/scd30_core.c

@@ -642,10 +642,8 @@ static int scd30_setup_trigger(struct iio_dev *indio_dev)
 
 	trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
 				      iio_device_id(indio_dev));
-	if (!trig) {
-		dev_err(dev, "failed to allocate trigger\n");
-		return -ENOMEM;
-	}
+	if (!trig)
+		return dev_err_probe(dev, -ENOMEM, "failed to allocate trigger\n");
 
 	trig->ops = &scd30_trigger_ops;
 	iio_trigger_set_drvdata(trig, indio_dev);
@@ -667,9 +665,9 @@ static int scd30_setup_trigger(struct iio_dev *indio_dev)
 					IRQF_NO_AUTOEN,
 					indio_dev->name, indio_dev);
 	if (ret)
-		dev_err(dev, "failed to request irq\n");
+		return dev_err_probe(dev, ret, "failed to request irq\n");
 
-	return ret;
+	return 0;
 }
 
 int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
@@ -717,17 +715,13 @@ int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
 		return ret;
 
 	ret = scd30_reset(state);
-	if (ret) {
-		dev_err(dev, "failed to reset device: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to reset device\n");
 
 	if (state->irq > 0) {
 		ret = scd30_setup_trigger(indio_dev);
-		if (ret) {
-			dev_err(dev, "failed to setup trigger: %d\n", ret);
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(dev, ret, "failed to setup trigger\n");
 	}
 
 	ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, scd30_trigger_handler, NULL);
@@ -735,23 +729,17 @@ int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
 		return ret;
 
 	ret = scd30_command_read(state, CMD_FW_VERSION, &val);
-	if (ret) {
-		dev_err(dev, "failed to read firmware version: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to read firmware version\n");
 	dev_info(dev, "firmware version: %d.%d\n", val >> 8, (char)val);
 
 	ret = scd30_command_write(state, CMD_MEAS_INTERVAL, state->meas_interval);
-	if (ret) {
-		dev_err(dev, "failed to set measurement interval: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to set measurement interval\n");
 
 	ret = scd30_command_write(state, CMD_START_MEAS, state->pressure_comp);
-	if (ret) {
-		dev_err(dev, "failed to start measurement: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to start measurement\n");
 
 	ret = devm_add_action_or_reset(dev, scd30_stop_meas, state);
 	if (ret)