xen/evtchn: ports start enabled

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 709c32d949bf..72dc7f20c5ed 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -108,10 +108,9 @@ irqreturn_t evtchn_interrupt(int irq, void *data)
 
         u = get_port_user(port);
 
-        if (WARN(!get_port_enabled(port),
-                 "Interrupt for port %d, but apparently not enabled; per-user %p\n",
-                 port, u))
-                goto out;
+        WARN(!get_port_enabled(port),
+             "Interrupt for port %d, but apparently not enabled; per-user %p\n",
+             port, u);
 
         disable_irq_nosync(irq);
         set_port_enabled(port, false);
@@ -127,7 +126,6 @@ irqreturn_t evtchn_interrupt(int irq, void *data)
         } else
                 u->ring_overflow = 1;
 
-out:
         spin_unlock(&port_user_lock);
 
         return IRQ_HANDLED;
@@ -265,6 +263,7 @@ static int evtchn_bind_to_user(struct per_user_data *u, int port)
          */
         BUG_ON(get_port_user(port) != NULL);
         set_port_user(port, u);
+        set_port_enabled(port, true); /* start enabled */
 
         rc = bind_evtchn_to_irqhandler(port, evtchn_interrupt, IRQF_DISABLED,
                                        u->name, (void *)(unsigned long)port);