[PATCHv4 5/5] qemu/virtio: mark msi vectors used on load

["Michael S. Tsirkin" <mst@xxxxxxxxxx>]

Usage of msi vectors is controlled by the guest and so needs to be
restored on load. Do this for msi vectors used by the virtio device.

Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
 hw/virtio-pci.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index f7da503..ddc3abb 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -131,6 +131,10 @@ static int virtio_pci_load_config(void * opaque, QEMUFile *f)
     msix_load(&proxy->pci_dev, f);
     if (msix_present(&proxy->pci_dev))
         qemu_get_be16s(f, &proxy->vdev->config_vector);
+    else
+        proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
+    if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR)
+        return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
     return 0;
 }
 
@@ -138,10 +142,13 @@ static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
 {
     VirtIOPCIProxy *proxy = opaque;
     uint16_t vector;
-    if (!msix_present(&proxy->pci_dev))
-        return 0;
-    qemu_get_be16s(f, &vector);
+    if (msix_present(&proxy->pci_dev))
+        qemu_get_be16s(f, &vector);
+    else
+        vector = VIRTIO_NO_VECTOR;
     virtio_queue_set_vector(proxy->vdev, n, vector);
+    if (vector != VIRTIO_NO_VECTOR)
+        return msix_vector_use(&proxy->pci_dev, vector);
     return 0;
 }
 
-- 
1.6.2.2
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