[PATCH] iio: adc: fix for_each_child.cocci warnings

[kernel test robot <lkp@intel.com>]

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CC: kbuild-all(a)lists.01.org
CC: linux-arm-kernel(a)lists.infradead.org
TO: Rajnikant Bhojani <rajnikant.bhojani@xilinx.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Hyun Kwon <hyun.kwon@xilinx.com>
CC: Shubhrajyoti Datta <shubhraj@xilinx.com>
CC: "Jean-Francois Dagenais" <jeff.dagenais@gmail.com>
CC: Olivier Dugas <dugaso@sonatest.com>
CC: Manish Narani <mnarani@xilinx.com>
CC: Jonathan Cameron <jic23@kernel.org>
CC: "Lars-Peter Clausen" <lars@metafoo.de>
CC: linux-iio(a)vger.kernel.org
CC: linux-arm-kernel(a)lists.infradead.org
CC: linux-kernel(a)vger.kernel.org

From: kernel test robot <lkp@intel.com>

drivers/iio/adc/xilinx-ams.c:917:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 923.


Semantic patch information:
 False positives can be due to function calls within the for_each
 loop that may encapsulate an of_node_put.

Generated by: scripts/coccinelle/iterators/for_each_child.cocci

CC: Rajnikant Bhojani <rajnikant.bhojani@xilinx.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15_LTS
head:   392586c95ba817468e81d14a767a94f3b43a2898
commit: d073b83d3f8f3ba83c59f7502371b1cf9eb35e92 [541/924] iio: adc: Add Xilinx AMS driver
:::::: branch date: 28 hours ago
:::::: commit date: 2 weeks ago

Please take the patch only if it's a positive warning. Thanks!

 drivers/iio/adc/xilinx-ams.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/adc/xilinx-ams.c
+++ b/drivers/iio/adc/xilinx-ams.c
@@ -920,6 +920,7 @@ static int ams_parse_dt(struct iio_dev *
 					      ams_channels + num_channels);
 			if (ret < 0) {
 				kfree(ams_channels);
+				of_node_put(child_node);
 				return ret;
 			}