virtio_pci: fix the common cfg map size

commit 061b39f upstream.

The function vp_modern_map_capability() takes the size parameter,
which corresponds to the size of virtio_pci_common_cfg. As a result,
this indicates the size of memory area to map.

Now the size is the size of virtio_pci_common_cfg, but some feature(such
as the _F_RING_RESET) needs the virtio_pci_modern_common_cfg, so this
commit changes the size to the size of virtio_pci_modern_common_cfg.

Cc: stable@vger.kernel.org
Fixes: 0b50cec ("virtio_pci: introduce helper to get/set queue reset")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Message-Id: <20231010031120.81272-3-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/virtio/virtio_pci_modern_dev.c

@@ -282,7 +282,7 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
 	err = -EINVAL;
 	mdev->common = vp_modern_map_capability(mdev, common,
 				      sizeof(struct virtio_pci_common_cfg), 4,
-				      0, sizeof(struct virtio_pci_common_cfg),
+				      0, sizeof(struct virtio_pci_modern_common_cfg),
 				      NULL, NULL);
 	if (!mdev->common)
 		goto err_map_common;