[PATCH 5.9 274/391] iio: ad7292: Fix of_node refcounting

[Greg Kroah-Hartman]

From: Nuno Sá <nuno.sa@xxxxxxxxxx>

commit b8a533f3c24b3b8f1fdbefc5ada6a7d5733d63e6 upstream.

When returning or breaking early from a
`for_each_available_child_of_node()` loop, we need to explicitly call
`of_node_put()` on the child node to possibly release the node.

Fixes: 506d2e317a0a0 ("iio: adc: Add driver support for AD7292")
Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20200925091045.302-2-nuno.sa@xxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/iio/adc/ad7292.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/iio/adc/ad7292.c
+++ b/drivers/iio/adc/ad7292.c
@@ -310,8 +310,10 @@ static int ad7292_probe(struct spi_devic
 
 	for_each_available_child_of_node(spi->dev.of_node, child) {
 		diff_channels = of_property_read_bool(child, "diff-channels");
-		if (diff_channels)
+		if (diff_channels) {
+			of_node_put(child);
 			break;
+		}
 	}
 
 	if (diff_channels) {