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[RFC,08/13] iio: adc: ti-ads131e08: Use __free(fwnode_handle) to replace fwnode_handle_put() calls

Message ID 20240101172611.694830-9-jic23@kernel.org
State Superseded
Headers show
Series device property / IIO: Use cleanup.h magic for fwnode_handle_put() handling. | expand

Commit Message

Jonathan Cameron Jan. 1, 2024, 5:26 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

This use of the new cleanup.h scope based freeing infrastructure allows
us to exit directly from error conditions within the
device_for_each_child_node(dev, child) loop. On normal exit from that
loop no fwnode_handle reference will be held and the child pointer
will be NULL thus making the automatically run fwnode_handle_put() a
noop.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
---
 drivers/iio/adc/ti-ads131e08.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
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Patch

diff --git a/drivers/iio/adc/ti-ads131e08.c b/drivers/iio/adc/ti-ads131e08.c
index fcfc46254313..fb1ab0b9a9db 100644
--- a/drivers/iio/adc/ti-ads131e08.c
+++ b/drivers/iio/adc/ti-ads131e08.c
@@ -694,7 +694,7 @@  static int ads131e08_alloc_channels(struct iio_dev *indio_dev)
 	struct ads131e08_channel_config *channel_config;
 	struct device *dev = &st->spi->dev;
 	struct iio_chan_spec *channels;
-	struct fwnode_handle *node;
+	struct fwnode_handle *node __free(fwnode_handle) = NULL;
 	unsigned int channel, tmp;
 	int num_channels, i, ret;
 
@@ -739,7 +739,7 @@  static int ads131e08_alloc_channels(struct iio_dev *indio_dev)
 	device_for_each_child_node(dev, node) {
 		ret = fwnode_property_read_u32(node, "reg", &channel);
 		if (ret)
-			goto err_child_out;
+			return ret;
 
 		ret = fwnode_property_read_u32(node, "ti,gain", &tmp);
 		if (ret) {
@@ -747,7 +747,7 @@  static int ads131e08_alloc_channels(struct iio_dev *indio_dev)
 		} else {
 			ret = ads131e08_pga_gain_to_field_value(st, tmp);
 			if (ret < 0)
-				goto err_child_out;
+				return ret;
 
 			channel_config[i].pga_gain = tmp;
 		}
@@ -758,7 +758,7 @@  static int ads131e08_alloc_channels(struct iio_dev *indio_dev)
 		} else {
 			ret = ads131e08_validate_channel_mux(st, tmp);
 			if (ret)
-				goto err_child_out;
+				return ret;
 
 			channel_config[i].mux = tmp;
 		}
@@ -784,10 +784,6 @@  static int ads131e08_alloc_channels(struct iio_dev *indio_dev)
 	st->channel_config = channel_config;
 
 	return 0;
-
-err_child_out:
-	fwnode_handle_put(node);
-	return ret;
 }
 
 static void ads131e08_regulator_disable(void *data)