xen/arm: enable evtchn irqs

On ARM irqs are not enabled by default:

- call enable_percpu_irq for IRQ_EVTCHN_CALLBACK;

- set the IRQF_VALID flag for the other irqs bound to evtchns. It causes
IRQ_NOAUTOEN to be set and as a consequence irq_unmask is going to be
called when a xenbus driver calls request_irq.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 0132505dc13fd9882acd46ea6b8ee6d496322ded..ca927552316ad8607d55d8a1d67eaac22847e742 100644 (file)
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -53,6 +53,7 @@
 #include <xen/interface/hvm/params.h>
 #include <xen/interface/physdev.h>
 #include <xen/interface/sched.h>
+#include <asm/hw_irq.h>
 
 /*
  * This lock protects updates to the following mapping and reference-count
@@ -827,6 +828,7 @@ int bind_evtchn_to_irq(unsigned int evtchn)
 
                xen_irq_info_evtchn_init(irq, evtchn);
        }
+       set_irq_flags(irq, IRQF_VALID);
 
 out:
        mutex_unlock(&irq_mapping_update_lock);
@@ -1751,6 +1753,7 @@ int __init xen_init_IRQ_arm(void)
        if (rc) {
                printk(KERN_ERR "Error requesting IRQ %d\n", IRQ_EVTCHN_CALLBACK);
        }
+       enable_percpu_irq(IRQ_EVTCHN_CALLBACK, 0);
        return rc;
 }
 core_initcall(xen_init_IRQ_arm);