net: set endianness on all backend devices

commit 5be7d9f1b1452613b95c6ba70b8d7ad3d0797991
       vhost-net: tell tap backend about the vnet endianness

makes vhost net to set the endianness of the device, but only for
the first device.

In case of multiqueue, we have multiple devices... This patch sets the
endianness for all the devices of the interface.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit a407644079c8639002e7ea635d851953b10a38c3)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 318c3e6ad2132a883d9d506137d25af1f5b0a829..10e233a7ff9a70b7670e7231ed112ad414b7da0e 100644 (file)
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -300,21 +300,19 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
     VirtioBusState *vbus = VIRTIO_BUS(qbus);
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
-    int r, e, i;
+    int r, e, i, j;
 
     if (!k->set_guest_notifiers) {
         error_report("binding does not support guest notifiers");
-        r = -ENOSYS;
-        goto err;
+        return -ENOSYS;
     }
 
-    r = vhost_net_set_vnet_endian(dev, ncs[0].peer, true);
-    if (r < 0) {
-        goto err;
-    }
-
-    for (i = 0; i < total_queues; i++) {
-        vhost_net_set_vq_index(get_vhost_net(ncs[i].peer), i * 2);
+    for (j = 0; j < total_queues; j++) {
+        r = vhost_net_set_vnet_endian(dev, ncs[j].peer, true);
+        if (r < 0) {
+            goto err_endian;
+        }
+        vhost_net_set_vq_index(get_vhost_net(ncs[j].peer), j * 2);
     }
 
     r = k->set_guest_notifiers(qbus->parent, total_queues * 2, true);
@@ -343,8 +341,9 @@ err_start:
         fflush(stderr);
     }
 err_endian:
-    vhost_net_set_vnet_endian(dev, ncs[0].peer, false);
-err:
+    while (--j >= 0) {
+        vhost_net_set_vnet_endian(dev, ncs[j].peer, false);
+    }
     return r;
 }