From 93797d87d63d36404907640e4e20bb976bff4744 Mon Sep 17 00:00:00 2001
From: Rob Herring <rob.herring@calxeda.com>
Date: Mon, 12 Dec 2011 09:59:14 -0600
Subject: [PATCH] irq: check domain hwirq range for DT translate

A DT node may have more than 1 domain associated with it, so make sure
the hwirq number is within range when doing DT translation.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/irq/irqdomain.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce832c585..8bd7479b8390 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct irq_domain *d,
 		return -EINVAL;
 	if (intsize < 1)
 		return -EINVAL;
+	if (d->nr_irq && ((intspec[0] < d->hwirq_base) ||
+	    (intspec[0] >= d->hwirq_base + d->nr_irq)))
+		return -EINVAL;
 
 	*out_hwirq = intspec[0];
 	*out_type = IRQ_TYPE_NONE;
-- 
2.20.1