[RFC PATCH v2 2/5] virtio-ccw: use virtio_force_modern()

[Halil Pasic <pasic@linux.ibm.com>]

The fact that revision > 0 was negotiated implies that VIRTIO_VERSION_1
aka modern must be used. This negotiation is done before the obligatory
reset. Let us call virtio_force_modern() after the reset if revision > 0
was negotiated, so that the VIRTIO_VERSION_1 feature can be set, and
endianness starts working as it should for devices that comply to the
virtio spec.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
---
 hw/s390x/virtio-ccw.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 6a2df1c1e9..88fbe87942 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -266,6 +266,9 @@ static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
         dev->summary_indicator = NULL;
     }
     ccw_dev->sch->thinint_active = false;
+    if (dev->revision > 0) {
+        virtio_force_modern(vdev);
+    }
 }
 
 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
-- 
2.25.1