[PATCH] pciback: fix circular loop in pcistub_match_one

[Jon Mason <jdmason@us.ibm.com>]

The for loop in pcistub_match_one will loop forever if the
dev->bus->self links to itself at the uppermost bridge.  Adding a check
to prevent linking back in on itself prevents this.

Thanks,
Jon

Signed-off-by: Jon Mason <jdmason@us.ibm.com>

diff -r d2bf1a7cc131 linux-2.6-xen-sparse/drivers/xen/pciback/pci_stub.c
--- a/linux-2.6-xen-sparse/drivers/xen/pciback/pci_stub.c	Sat Jul 29 14:05:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/pciback/pci_stub.c	Tue Aug  1 10:45:51 2006 -0500
@@ -232,6 +232,9 @@ static int __devinit pcistub_match_one(s
 		    && dev->bus->number == pdev_id->bus
 		    && dev->devfn == pdev_id->devfn)
 			return 1;
+
+		if (dev == dev->bus->self)
+			break;
 	}
 
 	return 0;