linux-kernel - [PATCH v2] of: Add missing of_node

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Date:   Fri, 22 Apr 2022 09:53:31 +0800
From:   Wan Jiabing <wanjiabing@...o.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Wan Jiabing <wanjiabing@...o.com>,
        kernel test robot <lkp@...el.com>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v2] of: Add missing of_node_put() before return

Fix the following coccicheck error:
drivers/of/platform.c:554:2-23: WARNING: Function for_each_node_by_type
should have of_node_put() before return around line 560.

Early exits from for_each_node_by_type() should decrement the
node reference counter.

Fixes: 52b1b46c39ae ("of: Create platform devices for OF framebuffers")
Reported-by: kernel test robot <lkp@...el.com>
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: Wan Jiabing <wanjiabing@...o.com>
---
Changelog:
v2:
- Add a missing ';'.
---
 drivers/of/platform.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 2dff3a3d137c..1bb895feb06d 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -556,8 +556,10 @@ static int __init of_platform_default_populate_init(void)
 			    !of_get_property(node, "linux,boot-display", NULL))
 				continue;
 			dev = of_platform_device_create(node, "of-display", NULL);
-			if (WARN_ON(!dev))
+			if (WARN_ON(!dev)) {
+				of_node_put(node);
 				return -ENOMEM;
+			}
 			boot_display = node;
 			break;
 		}
-- 
2.35.1