From ddeda0449fdb3b17fd9950680dda190e580fb419 Mon Sep 17 00:00:00 2001
From: Keir Fraser <keir@xen.org>
Date: Fri, 29 Oct 2010 18:06:17 +0100
Subject: [PATCH] VT-d: only scan secondary functions on multi-function devices

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---
 xen/drivers/passthrough/pci.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index d6d833142b..0a159804f1 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -445,6 +445,10 @@ int __init scan_pci_devices(void)
                         spin_unlock(&pcidevs_lock);
                         return -EINVAL;
                 }
+
+                if ( !func && !(pci_conf_read8(bus, dev, func,
+                                               PCI_HEADER_TYPE) & 0x80) )
+                    break;
             }
         }
     }
-- 
2.30.2