[PATCH] irq: Fix possible null pointer dereference on domains with no ops

[Mark Brown]

It is optional for irqdomains to have operations so we need to check for
their presence before dereferencing them when looking for dt_translate().

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 kernel/irq/irqdomain.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce83..b22a641 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -89,7 +89,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
 	/* Find a domain which can translate the irq spec */
 	mutex_lock(&irq_domain_mutex);
 	list_for_each_entry(domain, &irq_domain_list, list) {
-		if (!domain->ops->dt_translate)
+		if (!domain->ops || !domain->ops->dt_translate)
 			continue;
 		rc = domain->ops->dt_translate(domain, controller,
 					intspec, intsize, &hwirq, &type);
-- 
1.7.7.3

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