linux-kernel - [PATCH 4.4 14/20] irqchip/atmel-aic: Fix unbalanced of_node_put() in aic_common_irq

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Message-Id: <20170822190915.928135274@linuxfoundation.org>
Date:   Tue, 22 Aug 2017 12:09:57 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Marc Zyngier <marc.zyngier@....com>
Subject: [PATCH 4.4 14/20] irqchip/atmel-aic: Fix unbalanced of_node_put() in aic_common_irq_fixup()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Brezillon <boris.brezillon@...e-electrons.com>

commit 469bcef53c546bb792aa66303933272991b7831d upstream.

aic_common_irq_fixup() is calling twice of_node_put() on the same node
thus leading to an unbalanced refcount on the root node.

Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Reported-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Fixes: b2f579b58e93 ("irqchip: atmel-aic: Add irq fixup infrastructure")
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/irqchip/irq-atmel-aic-common.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -202,7 +202,6 @@ void __init aic_common_irq_fixup(const s
 		return;
 
 	match = of_match_node(matches, root);
-	of_node_put(root);
 
 	if (match) {
 		void (*fixup)(struct device_node *) = match->data;