x86: Check for valid pirq values in hvm_domain_use_pirq

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
xen-unstable changeset:   23339:f9bb0bbea7c2
xen-unstable date:        Thu May 12 16:42:54 2011 +0100

diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index 1fdc29513834ff54a2067993140cf6171549b106..9958b3c1c08393b561170225944eeeb6c07e7482 100644 (file)
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -1871,7 +1871,7 @@ int hvm_domain_use_pirq(struct domain *d, int pirq)
 {
     int emuirq;
     
-    if ( !is_hvm_domain(d) )
+    if ( !is_hvm_domain(d) || pirq < 0 )
         return 0;
 
     emuirq = domain_pirq_to_emuirq(d, pirq);