virtio_pci: fix the common cfg map size

commit 061b39fdfe7fd98946e67637213bcbb10a318cca 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: 0b50cece0b78 ("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>

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index 869cb46bef9603597b44db5f72d19c186e6c056e..ccdd41935ed7161bf7aa460a42b4110f37e63e1c 100644 (file)
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/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;