xen/evtchn: ports start enabled

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

diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 709c32d..72dc7f2 100644 (file)
--- 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);