[PATCH v1] ARM: imx: avic: Fix OF node reference leaks

[PATCH v1] ARM: imx: avic: Fix OF node reference leaks

[Yuho Choi]

of_find_compatible_node() returns a device node with its reference count
incremented. mxc_init_irq() looks up the i.MX25 CCM node for of_iomap()
and the AVIC node for irq_domain_create_legacy(), but does not release
either temporary reference.

of_iomap() does not consume the node reference, and
irq_domain_create_legacy() takes its own fwnode reference for the domain.
Drop the temporary OF node references after each use.

Fixes: 9b454d16e57d ("ARM: imx: avic: set low-power interrupt mask for imx25")
Fixes: 544496ab5cbd ("ARM: imx: move irq_domain_add_legacy call into avic driver")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
---
 arch/arm/mach-imx/avic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-imx/avic.c b/arch/arm/mach-imx/avic.c
index 3067c06b4b8e..6873a50bbe2c 100644
--- a/arch/arm/mach-imx/avic.c
+++ b/arch/arm/mach-imx/avic.c
@@ -173,6 +173,7 @@ static void __init mxc_init_irq(void __iomem *irqbase)
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx25-ccm");
 	mx25_ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 
 	if (mx25_ccm_base) {
 		/*
@@ -203,6 +204,7 @@ static void __init mxc_init_irq(void __iomem *irqbase)
 	np = of_find_compatible_node(NULL, NULL, "fsl,avic");
 	domain = irq_domain_create_legacy(of_fwnode_handle(np), AVIC_NUM_IRQS, irq_base, 0,
 					  &irq_domain_simple_ops, NULL);
+	of_node_put(np);
 	WARN_ON(!domain);
 
 	for (i = 0; i < AVIC_NUM_IRQS / 32; i++, irq_base += 32)
-- 
2.43.0