linux-kernel - [PATCH v2] arm: mach-spear: Add missing of_node

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Message-Id: <20220616093027.3984903-1-windhl@126.com>
Date:   Thu, 16 Jun 2022 17:30:27 +0800
From:   Liang He <windhl@....com>
To:     vireshk@...nel.org, shiraz.linux.kernel@...il.com, soc@...nel.org,
        linux@...linux.org.uk
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        windhl@....com
Subject: [PATCH v2] arm: mach-spear: Add missing of_node_put() in time.c

In spear_setup_of_timer(), of_find_matching_node() will return a
node pointer with refcount incrementd. We should use of_node_put()
in each fail path or when it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 changelog:
 
 v2: use goto-label patch style suggested by Viresh.
 v1: use plain of_node_put in each fail path.

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

diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c
index d1fdb6066f7b..c7c17c0f936c 100644
--- a/arch/arm/mach-spear/time.c
+++ b/arch/arm/mach-spear/time.c
@@ -218,13 +218,13 @@ void __init spear_setup_of_timer(void)
 	irq = irq_of_parse_and_map(np, 0);
 	if (!irq) {
 		pr_err("%s: No irq passed for timer via DT\n", __func__);
-		return;
+		goto err_put_np;
 	}
 
 	gpt_base = of_iomap(np, 0);
 	if (!gpt_base) {
 		pr_err("%s: of iomap failed\n", __func__);
-		return;
+		goto err_put_np;
 	}
 
 	gpt_clk = clk_get_sys("gpt0", NULL);
@@ -239,6 +239,8 @@ void __init spear_setup_of_timer(void)
 		goto err_prepare_enable_clk;
 	}
 
+	of_node_put(np);
+
 	spear_clockevent_init(irq);
 	spear_clocksource_init();
 
@@ -248,4 +250,6 @@ void __init spear_setup_of_timer(void)
 	clk_put(gpt_clk);
 err_iomap:
 	iounmap(gpt_base);
+err_put_np:
+	of_node_put(np);
 }
-- 
2.25.1