From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
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.
Cc: Nuno Sá <nuno.sa@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/iio/dac/ad5770r.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/iio/dac/ad5770r.c b/drivers/iio/dac/ad5770r.c
index f66d67402e43..782a04406576 100644
--- a/drivers/iio/dac/ad5770r.c
+++ b/drivers/iio/dac/ad5770r.c
@@ -515,7 +515,7 @@ static int ad5770r_channel_config(struct ad5770r_state *st)
{
int ret, tmp[2], min, max;
unsigned int num;
- struct fwnode_handle *child;
+ struct fwnode_handle *child __free(fwnode_handle) = NULL;
num = device_get_child_node_count(&st->spi->dev);
if (num != AD5770R_MAX_CHANNELS)
@@ -524,30 +524,24 @@ static int ad5770r_channel_config(struct ad5770r_state *st)
device_for_each_child_node(&st->spi->dev, child) {
ret = fwnode_property_read_u32(child, "reg", &num);
if (ret)
- goto err_child_out;
- if (num >= AD5770R_MAX_CHANNELS) {
- ret = -EINVAL;
- goto err_child_out;
- }
+ return ret;
+ if (num >= AD5770R_MAX_CHANNELS)
+ return -EINVAL;
ret = fwnode_property_read_u32_array(child,
"adi,range-microamp",
tmp, 2);
if (ret)
- goto err_child_out;
+ return ret;
min = tmp[0] / 1000;
max = tmp[1] / 1000;
ret = ad5770r_store_output_range(st, min, max, num);
if (ret)
- goto err_child_out;
+ return ret;
}
return 0;
-
-err_child_out:
- fwnode_handle_put(child);
- return ret;
}
static int ad5770r_init(struct ad5770r_state *st)
--
2.43.0
