linux-kernel - [PATCH v4 1/3] arm: mvebu: add missing of_node

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Date:	Mon, 26 Aug 2013 19:36:56 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<jszhang@...vell.com>, <jason@...edaemon.net>, <andrew@...n.ch>,
	<gregory.clement@...e-electrons.com>,
	<thomas.petazzoni@...e-electrons.com>,
	<ezequiel.garcia@...e-electrons.com>, <mturquette@...aro.org>,
	<sebastian.hesselbarth@...il.com>, <linus.walleij@...aro.org>
CC:	<linux@....linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v4 1/3] arm: mvebu: add missing of_node_put() to fix reference leak

Add of_node_put to properly decrement the refcount when we are
done using a given node.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
---
 arch/arm/mach-mvebu/coherency.c         | 8 +++++++-
 arch/arm/mach-mvebu/platsmp.c           | 1 +
 arch/arm/mach-mvebu/pmsu.c              | 1 +
 arch/arm/mach-mvebu/system-controller.c | 1 +
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 4c24303..58adf2f 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -140,6 +140,7 @@ int __init coherency_init(void)
 		coherency_base = of_iomap(np, 0);
 		coherency_cpu_base = of_iomap(np, 1);
 		set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
+		of_node_put(np);
 	}
 
 	return 0;
@@ -147,9 +148,14 @@ int __init coherency_init(void)
 
 static int __init coherency_late_init(void)
 {
-	if (of_find_matching_node(NULL, of_coherency_table))
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, of_coherency_table);
+	if (np) {
 		bus_register_notifier(&platform_bus_type,
 				      &mvebu_hwcc_platform_nb);
+		of_node_put(np);
+	}
 	return 0;
 }
 
diff --git a/arch/arm/mach-mvebu/platsmp.c b/arch/arm/mach-mvebu/platsmp.c
index 4f960f0..5624a8f 100644
--- a/arch/arm/mach-mvebu/platsmp.c
+++ b/arch/arm/mach-mvebu/platsmp.c
@@ -118,6 +118,7 @@ void __init armada_xp_smp_prepare_cpus(unsigned int max_cpus)
 		panic("Cannot find 'marvell,bootrom' compatible node");
 
 	err = of_address_to_resource(node, 0, &res);
+	of_node_put(node);
 	if (err < 0)
 		panic("Cannot get 'bootrom' node address");
 
diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index 3cc4bef..27fc4f0 100644
--- a/arch/arm/mach-mvebu/pmsu.c
+++ b/arch/arm/mach-mvebu/pmsu.c
@@ -67,6 +67,7 @@ int __init armada_370_xp_pmsu_init(void)
 		pr_info("Initializing Power Management Service Unit\n");
 		pmsu_mp_base = of_iomap(np, 0);
 		pmsu_reset_base = of_iomap(np, 1);
+		of_node_put(np);
 	}
 
 	return 0;
diff --git a/arch/arm/mach-mvebu/system-controller.c b/arch/arm/mach-mvebu/system-controller.c
index f875124..5175083c 100644
--- a/arch/arm/mach-mvebu/system-controller.c
+++ b/arch/arm/mach-mvebu/system-controller.c
@@ -98,6 +98,7 @@ static int __init mvebu_system_controller_init(void)
 		BUG_ON(!match);
 		system_controller_base = of_iomap(np, 0);
 		mvebu_sc = (struct mvebu_system_controller *)match->data;
+		of_node_put(np);
 	}
 
 	return 0;
-- 
1.8.4.rc3

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