linux-kernel - [PATCH v2] arm: mach-rockchip: (pm) Add missing of_node

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Date:   Thu, 16 Jun 2022 10:17:13 +0800
From:   Liang He <windhl@....com>
To:     linux@...linux.org.uk, heiko@...ech.de
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        windhl@....com
Subject: [PATCH v2] arm: mach-rockchip: (pm) Add missing of_node_put()

In rockchip_suspend_init(), of_find_matching_node_and_match() will
return a node pointer with refcount incremented. We should use
of_node_put() in fail path or when it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 changelog:

 v2: (1) use real name for Sob (2) use goto-label patch style
 v1: add of_node_put() for each return

 arch/arm/mach-rockchip/pm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
index 87389d9456b9..bb46ac4f65d4 100644
--- a/arch/arm/mach-rockchip/pm.c
+++ b/arch/arm/mach-rockchip/pm.c
@@ -311,7 +311,7 @@ void __init rockchip_suspend_init(void)
 					     &match);
 	if (!match) {
 		pr_err("Failed to find PMU node\n");
-		return;
+		goto out_put;
 	}
 	pm_data = (struct rockchip_pm_data *) match->data;
 
@@ -320,9 +320,13 @@ void __init rockchip_suspend_init(void)
 
 		if (ret) {
 			pr_err("%s: matches init error %d\n", __func__, ret);
-			return;
+			goto out_put;
 		}
 	}
 
 	suspend_set_ops(pm_data->ops);
+	
+out_put:
+	of_node_put(np);
+	
 }
-- 
2.25.1