xen: get_free_pirq: make sure that the returned pirq is allocated

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

1 files changed, 6 insertions, 0 deletions

diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index 4d0c590687..9518d60087 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -1587,13 +1587,19 @@ int get_free_pirq(struct domain *d, int type, int index)
     {
         for ( i = 16; i < nr_irqs_gsi; i++ )
             if ( is_free_pirq(d, pirq_info(d, i)) )
+            {
+                pirq_get_info(d, i);
                 return i;
+            }
     }
     else
     {
         for ( i = d->nr_pirqs - 1; i >= nr_irqs_gsi; i-- )
             if ( is_free_pirq(d, pirq_info(d, i)) )
+            {
+                pirq_get_info(d, i);
                 return i;
+            }
     }
 
     return -ENOSPC;