virtio-pci: read the right virtio_pci_notify_cap field

Looks like a copy-paste bug. The value is used as an optimization and a
wrong value probably isn't causing any serious damage. Found when
porting this code to Windows.

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index c0c11fad4611..7760fc1a2218 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -679,7 +679,7 @@ int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
 
         pci_read_config_dword(pci_dev,
                               notify + offsetof(struct virtio_pci_notify_cap,
-                                                cap.length),
+                                                cap.offset),
                               &notify_offset);
 
         /* We don't know how many VQs we'll map, ahead of the time.