[Xen-devel] [PATCH 1.1 V2] xen: Fix PV-on-HVM

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

In the context of PV-on-HVM under Xen, the emulated nics are supposed to be
unplug before the guest drivers are initialized, when the guest write to a
specific IO port.

Without this patch, the guest end up with two nics with the same MAC, the
emulated nic and the PV nic.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 hw/xen_platform.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index a9c52a6..0214f37 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -87,7 +87,10 @@ static void unplug_nic(PCIBus *b, PCIDevice *d)
 {
     if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
             PCI_CLASS_NETWORK_ETHERNET) {
-        qdev_unplug(&(d->qdev), NULL);
+        /* Until qdev_free includes a call to object_unparent, we call it here
+         */
+        object_unparent(&d->qdev.parent_obj);
+        qdev_free(&d->qdev);
     }
 }
 
-- 
Anthony PERARD


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