[Xen-changelog] [linux-2.6.18-xen] Don't WARN_ON -ENOSYS from PHYSDEVOP_manage_pci_remove

["Xen patchbot-linux-2.6.18-xen" <patchbot-linux-2.6.18-xen@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1218189299 -3600
# Node ID 87413eba04ab80ef1d87bff6ff92ebe2f64214d8
# Parent  2866e6af503ea0b33e1c1fb2340ab8ed81925e97
Don't WARN_ON -ENOSYS from PHYSDEVOP_manage_pci_remove

We let -ENOSYS slip through on the add side to support old
hypervisors, let's do the same on the remove end so we don't get stack
dumps during bootup.

Signed-off-by: Alex Williamson <alex.williamson@xxxxxx>
---
 drivers/xen/core/pci.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff -r 2866e6af503e -r 87413eba04ab drivers/xen/core/pci.c
--- a/drivers/xen/core/pci.c    Thu Jul 31 15:33:54 2008 +0100
+++ b/drivers/xen/core/pci.c    Fri Aug 08 10:54:59 2008 +0100
@@ -23,9 +23,13 @@ static int pci_bus_probe_wrapper(struct 
                return r;
 
        r = pci_bus_probe(dev);
-       if (r)
-               WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
-                                             &manage_pci));
+       if (r) {
+               int ret;
+
+               ret = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
+                                           &manage_pci);
+               WARN_ON(ret && ret != -ENOSYS);
+       }
 
        return r;
 }

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