[PATCH] virtio-pci: Fix the failure process in kvm_virtio_pci_vector_use_one()

[Cindy Lu]

In function kvm_virtio_pci_vector_use_one(), in the undo label,
the function will get the vector incorrectly while using
VIRTIO_CONFIG_IRQ_IDX
To fix this, we remove this label and simplify the failure process

Fixes: f9a09ca3ea ("vhost: add support for configure interrupt")
Cc: qemu-stable@nongnu.org
Signed-off-by: Cindy Lu <lulu@redhat.com>
---
 hw/virtio/virtio-pci.c | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index b138fa127a..565bdb0897 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -892,7 +892,7 @@ static int kvm_virtio_pci_vector_use_one(VirtIOPCIProxy 
*proxy, int queue_no)
     }
     ret = kvm_virtio_pci_vq_vector_use(proxy, vector);
     if (ret < 0) {
-        goto undo;
+        return ret;
     }
     /*
      * If guest supports masking, set up irqfd now.
@@ -902,25 +902,12 @@ static int kvm_virtio_pci_vector_use_one(VirtIOPCIProxy 
*proxy, int queue_no)
         ret = kvm_virtio_pci_irqfd_use(proxy, n, vector);
         if (ret < 0) {
             kvm_virtio_pci_vq_vector_release(proxy, vector);
-            goto undo;
+            kvm_virtio_pci_irqfd_release(proxy, n, vector);
+            return ret;
         }
     }
 
     return 0;
-undo:
-
-    vector = virtio_queue_vector(vdev, queue_no);
-    if (vector >= msix_nr_vectors_allocated(dev)) {
-        return ret;
-    }
-    if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
-        ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
-        if (ret < 0) {
-            return ret;
-        }
-        kvm_virtio_pci_irqfd_release(proxy, n, vector);
-    }
-    return ret;
 }
 static int kvm_virtio_pci_vector_vq_use(VirtIOPCIProxy *proxy, int nvqs)
 {
-- 
2.43.0