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path: root/drivers/xen/events/events_base.c
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Diffstat (limited to 'drivers/xen/events/events_base.c')
-rw-r--r--drivers/xen/events/events_base.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 3b9f080109..27553673e4 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -1190,7 +1190,7 @@ int xen_pirq_from_irq(unsigned irq)
EXPORT_SYMBOL_GPL(xen_pirq_from_irq);
static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip,
- struct xenbus_device *dev)
+ struct xenbus_device *dev, bool shared)
{
int ret = -ENOMEM;
struct irq_info *info;
@@ -1224,7 +1224,8 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip,
*/
bind_evtchn_to_cpu(info, 0, false);
} else if (!WARN_ON(info->type != IRQT_EVTCHN)) {
- info->refcnt++;
+ if (shared && !WARN_ON(info->refcnt < 0))
+ info->refcnt++;
}
ret = info->irq;
@@ -1237,13 +1238,13 @@ out:
int bind_evtchn_to_irq(evtchn_port_t evtchn)
{
- return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip, NULL);
+ return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip, NULL, false);
}
EXPORT_SYMBOL_GPL(bind_evtchn_to_irq);
int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn)
{
- return bind_evtchn_to_irq_chip(evtchn, &xen_lateeoi_chip, NULL);
+ return bind_evtchn_to_irq_chip(evtchn, &xen_lateeoi_chip, NULL, false);
}
EXPORT_SYMBOL_GPL(bind_evtchn_to_irq_lateeoi);
@@ -1295,7 +1296,8 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
static int bind_interdomain_evtchn_to_irq_chip(struct xenbus_device *dev,
evtchn_port_t remote_port,
- struct irq_chip *chip)
+ struct irq_chip *chip,
+ bool shared)
{
struct evtchn_bind_interdomain bind_interdomain;
int err;
@@ -1307,14 +1309,14 @@ static int bind_interdomain_evtchn_to_irq_chip(struct xenbus_device *dev,
&bind_interdomain);
return err ? : bind_evtchn_to_irq_chip(bind_interdomain.local_port,
- chip, dev);
+ chip, dev, shared);
}
int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev,
evtchn_port_t remote_port)
{
return bind_interdomain_evtchn_to_irq_chip(dev, remote_port,
- &xen_lateeoi_chip);
+ &xen_lateeoi_chip, false);
}
EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irq_lateeoi);
@@ -1430,7 +1432,8 @@ static int bind_evtchn_to_irqhandler_chip(evtchn_port_t evtchn,
{
int irq, retval;
- irq = bind_evtchn_to_irq_chip(evtchn, chip, NULL);
+ irq = bind_evtchn_to_irq_chip(evtchn, chip, NULL,
+ irqflags & IRQF_SHARED);
if (irq < 0)
return irq;
retval = request_irq(irq, handler, irqflags, devname, dev_id);
@@ -1471,7 +1474,8 @@ static int bind_interdomain_evtchn_to_irqhandler_chip(
{
int irq, retval;
- irq = bind_interdomain_evtchn_to_irq_chip(dev, remote_port, chip);
+ irq = bind_interdomain_evtchn_to_irq_chip(dev, remote_port, chip,
+ irqflags & IRQF_SHARED);
if (irq < 0)
return irq;