linux-kernel - [PATCH v3] arch: arm: mach-pxa: Add missing of_node

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Message-Id: <20220615114844.3964639-1-windhl@126.com>
Date:   Wed, 15 Jun 2022 19:48:44 +0800
From:   Liang He <windhl@....com>
To:     daniel@...que.org, haojian.zhuang@...il.com,
        robert.jarzmik@...e.fr, linux@...linux.org.uk
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        windhl@....com
Subject: [PATCH v3] arch: arm: mach-pxa: Add missing of_node_put in irq.c

In pxa_dt_irq_init(), of_find_matching_node() will return a node
pointer with refcount incremented. We should use of_node_put in
fail path or when it is not used anymore. This goto-label patch
style is advised by Daniel.

Signed-off-by: Liang He <windhl@....com>
---
  changelog:
    v3: (1) use formal name (2) use -v N for format-patch (3) add
this changelog
    v2: use goto-label patch style advised by Daniel
    v1: add of_node_put in each fail path

 arch/arm/mach-pxa/irq.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 96f33ef1d9ea..5d7dd307013e 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -247,13 +247,13 @@ void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int))
 				   &pxa_internal_irq_nr);
 	if (ret) {
 		pr_err("Not found marvell,intc-nr-irqs property\n");
-		return;
+		goto out_put;
 	}
 
 	ret = of_address_to_resource(node, 0, &res);
 	if (ret < 0) {
 		pr_err("No registers defined for node\n");
-		return;
+		goto out_put;
 	}
 	pxa_irq_base = io_p2v(res.start);
 
@@ -263,9 +263,12 @@ void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int))
 	ret = irq_alloc_descs(-1, 0, pxa_internal_irq_nr, 0);
 	if (ret < 0) {
 		pr_err("Failed to allocate IRQ numbers\n");
-		return;
+		goto out_put;
 	}
 
 	pxa_init_irq_common(node, pxa_internal_irq_nr, fn);
+	
+out_put:
+	of_node_put(node);
 }
 #endif /* CONFIG_OF */
-- 
2.25.1