virtio: pci: Fix an error handling path in vp_modern_probe()

[ Upstream commit 7a836a2 ]

If an error occurs after a successful pci_request_selected_regions() call,
it should be undone by a corresponding pci_release_selected_regions() call,
as already done in vp_modern_remove().

Fixes: fd50272 ("virtio-pci: introduce modern device module")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Message-Id: <237109725aad2c3c03d14549f777b1927c84b045.1648977064.git.christophe.jaillet@wanadoo.fr>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/virtio/virtio_pci_modern_dev.c

@@ -340,6 +340,7 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
 err_map_isr:
 	pci_iounmap(pci_dev, mdev->common);
 err_map_common:
+	pci_release_selected_regions(pci_dev, mdev->modern_bars);
 	return err;
 }
 EXPORT_SYMBOL_GPL(vp_modern_probe);