[PATCH] vp_vdpa: correct the return value when fail to map notification

We forget to assign a error value when we fail to map the notification
during prove. This patch fixes it.

Reported-by: kernel test robot <redacted>
Reported-by: Dan Carpenter <redacted>
Fixes: 11d8ffed00b23 ("vp_vdpa: switch to use vp_modern_map_vq_notify()")
Signed-off-by: Jason Wang <redacted>
---
drivers/vdpa/virtio_pci/vp_vdpa.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index c76ebb531212..9145e0624565 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c

@@ -442,6 +442,7 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)

			vp_modern_map_vq_notify(mdev, i,
						&vp_vdpa->vring[i].notify_pa);
		if (!vp_vdpa->vring[i].notify) {
+			ret = -EINVAL;
			dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);
			goto err;
		}
-- 
2.25.1