[PATCH] iio: versal-sysmon: fix for_each_child.cocci warnings

[PATCH] iio: versal-sysmon: fix for_each_child.cocci warnings

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-arm-kernel(a)lists.infradead.org
TO: Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Dragan Cvetic <dragan.cvetic@xilinx.com>
CC: Jonathan Cameron <jic23@kernel.org>
CC: "Lars-Peter Clausen" <lars@metafoo.de>
CC: git(a)xilinx.com
CC: linux-iio(a)vger.kernel.org
CC: linux-kernel(a)vger.kernel.org

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

drivers/iio/adc/versal-sysmon.c:876:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 879.
drivers/iio/adc/versal-sysmon.c:876:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 883.


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: Anand Ashok Dumbre <anand.ashok.dumbre@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
head:   966124532656bc95d781abf57531e4cd4f962237
commit: 1459646ab280aa68c3c4fa1d9552ea21f15d7a2d [543/923] iio: versal-sysmon: add driver for Versal Sysmon
:::::: branch date: 3 days ago
:::::: commit date: 12 days ago

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

 versal-sysmon.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/iio/adc/versal-sysmon.c
+++ b/drivers/iio/adc/versal-sysmon.c
@@ -875,12 +875,16 @@ static int sysmon_parse_dt(struct iio_de
 
 	for_each_child_of_node(np, child_node) {
 		ret = of_property_read_u32(child_node, "reg", &reg);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child_node);
 			return ret;
+		}
 
 		ret = of_property_read_string(child_node, "xlnx,name", &name);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child_node);
 			return ret;
+		}
 
 		sysmon_channels[i].type = IIO_VOLTAGE;
 		sysmon_channels[i].indexed = 1;

[xilinx-xlnx:xlnx_rebase_v5.15 543/923] drivers/iio/adc/versal-sysmon.c:876:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 879.

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-arm-kernel(a)lists.infradead.org
TO: Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Dragan Cvetic <dragan.cvetic@xilinx.com>

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15
head:   966124532656bc95d781abf57531e4cd4f962237
commit: 1459646ab280aa68c3c4fa1d9552ea21f15d7a2d [543/923] iio: versal-sysmon: add driver for Versal Sysmon
:::::: branch date: 3 days ago
:::::: commit date: 12 days ago
config: alpha-randconfig-c024-20220208 (https://download.01.org/0day-ci/archive/20220213/202202130525.AeZFNTY0-lkp(a)intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>


cocci warnings: (new ones prefixed by >>)
>> drivers/iio/adc/versal-sysmon.c:876:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 879.
   drivers/iio/adc/versal-sysmon.c:876:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 883.

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org