uio: pci_sva: correct '-ENODEV' check logic

The current '-ENODEV' check uses '&&', which can lead to a NULL pointer
dereference when udev is NULL.

Fix the condition to return -ENODEV if either udev or its pdev is NULL.

Fixes: 3397c3cd859a ("uio: Add SVA support for PCI devices via uio_pci_generic_sva.c")
Signed-off-by: Haiyue Wang <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/uio/uio_pci_generic_sva.c

···
 	struct uio_pci_sva_dev *udev = info->priv;
 	struct iommu_domain *domain;
 
-	if (!udev && !udev->pdev)
+	if (!udev || !udev->pdev)
 		return -ENODEV;
 
 	domain = iommu_get_domain_for_dev(&udev->pdev->dev);
···
 {
 	struct uio_pci_sva_dev *udev = info->priv;
 
-	if (!udev && !udev->pdev)
+	if (!udev || !udev->pdev)
 		return -ENODEV;
 
 	iommu_sva_unbind_device(udev->sva_handle);