[PATCH 09/12] xen/events: add a evtchn_op for port setup

[David Vrabel <david.vrabel@citrix.com>]

From: David Vrabel <david.vrabel@citrix.com>

Add a hook for port-specific setup and call it from
xen_irq_info_common_setup().

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 drivers/xen/events/events.c          |    2 +-
 drivers/xen/events/events_internal.h |    8 ++++++++
 2 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/xen/events/events.c b/drivers/xen/events/events.c
index 759acb4..b2746f1 100644
--- a/drivers/xen/events/events.c
+++ b/drivers/xen/events/events.c
@@ -116,7 +116,7 @@ static int xen_irq_info_common_setup(struct irq_info *info,
 
 	irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
 
-	return 0;
+	return xen_evtchn_port_setup(info);
 }
 
 static int xen_irq_info_evtchn_setup(unsigned irq,
diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
index 513c34d..32cb928 100644
--- a/drivers/xen/events/events_internal.h
+++ b/drivers/xen/events/events_internal.h
@@ -55,6 +55,7 @@ struct irq_info {
 #define PIRQ_SHAREABLE	(1 << 1)
 
 struct evtchn_ops {
+	int (*setup)(struct irq_info *info);
 	void (*bind_to_cpu)(struct irq_info *info, int cpu);
 
 	void (*clear_pending)(int port);
@@ -75,6 +76,13 @@ struct irq_info *info_for_irq(unsigned irq);
 unsigned cpu_from_irq(unsigned irq);
 unsigned cpu_from_evtchn(unsigned int evtchn);
 
+static inline int xen_evtchn_port_setup(struct irq_info *info)
+{
+	if (evtchn_ops->setup)
+		return evtchn_ops->setup(info);
+	return 0;
+}
+
 static inline void xen_evtchn_port_bind_to_cpu(struct irq_info *info, int cpu)
 {
 	evtchn_ops->bind_to_cpu(info, cpu);
-- 
1.7.2.5