From: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
commit 98b7b0ca0828907dbb706387c11356a45463e2ea upstream.
device_for_each_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.
Fixes: cbbb819837f6 ("iio: dac: ad5770r: Add AD5770R support")
Cc: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Alexandru Ardelean <ardeleanalex@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210510095649.3302835-1-andy.shevchenko@xxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/dac/ad5770r.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
--- a/drivers/iio/dac/ad5770r.c
+++ b/drivers/iio/dac/ad5770r.c
@@ -524,23 +524,29 @@ static int ad5770r_channel_config(struct
device_for_each_child_node(&st->spi->dev, child) {
ret = fwnode_property_read_u32(child, "num", &num);
if (ret)
- return ret;
- if (num >= AD5770R_MAX_CHANNELS)
- return -EINVAL;
+ goto err_child_out;
+ if (num >= AD5770R_MAX_CHANNELS) {
+ ret = -EINVAL;
+ goto err_child_out;
+ }
ret = fwnode_property_read_u32_array(child,
"adi,range-microamp",
tmp, 2);
if (ret)
- return ret;
+ goto err_child_out;
min = tmp[0] / 1000;
max = tmp[1] / 1000;
ret = ad5770r_store_output_range(st, min, max, num);
if (ret)
- return ret;
+ goto err_child_out;
}
+ return 0;
+
+err_child_out:
+ fwnode_handle_put(child);
return ret;
}
