[PATCH] v4l: xilinx-vpss-csc: 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: Rohit Athavale <rohit.athavale@xilinx.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Hyun Kwon <hyun.kwon@xilinx.com>
CC: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
CC: Mauro Carvalho Chehab <mchehab@kernel.org>
CC: linux-media(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/media/platform/xilinx/xilinx-vpss-csc.c:747:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 752.
drivers/media/platform/xilinx/xilinx-vpss-csc.c:747:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 758.
drivers/media/platform/xilinx/xilinx-vpss-csc.c:747:1-23: WARNING: Function "for_each_child_of_node" should have of_node_put() before return around line 763.


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: Rohit Athavale <rohit.athavale@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 master
head:   45cd0074cdf1ddd710b28848e6a860b442babfcc
commit: 7d47a653da2e81cb73f43e507664d36305819ea1 [10741/12418] v4l: xilinx-vpss-csc: driver support for xilinx vpss csc
:::::: branch date: 5 days ago
:::::: commit date: 5 months ago

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

 xilinx-vpss-csc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/media/platform/xilinx/xilinx-vpss-csc.c
+++ b/drivers/media/platform/xilinx/xilinx-vpss-csc.c
@@ -749,17 +749,20 @@ static int xcsc_parse_of(struct xcsc_dev
 			vip_format = xvip_of_get_format(port);
 			if (IS_ERR(vip_format)) {
 				dev_err(dev, "Invalid media pad format in DT");
+				of_node_put(port);
 				return PTR_ERR(vip_format);
 			}
 
 			rval = of_property_read_u32(port, "reg", &port_id);
 			if (rval < 0) {
 				dev_err(dev, "No reg in DT to specify pad");
+				of_node_put(port);
 				return rval;
 			}
 
 			if (port_id != 0 && port_id != 1) {
 				dev_err(dev, "Invalid reg in DT");
+				of_node_put(port);
 				return -EINVAL;
 			}
 			xcsc->vip_formats[port_id] = vip_format;