Make our PV drivers work with older hosts that do not recognize the new PV driver protocol.
Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com>
Index: xen-4.0.0-testing/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
===================================================================
--- xen-4.0.0-testing.orig/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
+++ xen-4.0.0-testing/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
@@ -320,7 +320,10 @@ static int check_platform_magic(struct d
if (magic != XEN_IOPORT_MAGIC_VAL) {
err = "unrecognised magic value";
- goto no_dev;
+ /*
+ * Older backend; just return 0 to be compatible.
+ */
+ return 0;
}
protocol = inb(XEN_IOPORT_PROTOVER);
