datapath-windows: Hot add CPU support.

Hot add CPU is the ability to dynamically add CPUs to a running
system. Adding CPUs can occur physically by adding new hardware,
logically by online hardware partitioning, or virtually through
a virtualization layer.

This patch add support to reallocate any per-cpu resources, in
case a new processor is added.

Signed-off-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Reported-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Reported-at: https://github.com/openvswitch/ovs-issues/issues/112
Acked-by: Paul-Daniel Boca <pboca@cloudbasesolutions.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/datapath-windows/ovsext/Driver.c b/datapath-windows/ovsext/Driver.c
index 853886e2e..80979ea61 100644
--- a/datapath-windows/ovsext/Driver.c
+++ b/datapath-windows/ovsext/Driver.c
@@ -96,7 +96,10 @@ DriverEntry(PDRIVER_OBJECT driverObject,
     UNREFERENCED_PARAMETER(registryPath);
 
     /* Initialize driver associated data structures. */
-    OvsInit();
+    status = OvsInit();
+    if (status != NDIS_STATUS_SUCCESS) {
+        goto cleanup;
+    }
 
     gOvsExtDriverObject = driverObject;
 
@@ -175,12 +178,12 @@ OvsExtUnload(struct _DRIVER_OBJECT *driverObject)
 {
     UNREFERENCED_PARAMETER(driverObject);
 
-    /* Release driver associated data structures. */
-    OvsCleanup();
-
     OvsDeleteDeviceObject();
 
     NdisFDeregisterFilterDriver(gOvsExtDriverHandle);
+
+    /* Release driver associated data structures. */
+    OvsCleanup();
 }