From: Chen Hanxiao <chenhanx...@gmail.com>
If backend(such as dpdk) lack this feature,
don't assume it and mark it in vring_enable.
Or we may fail in vhost_net_start,
then we can't use vhost net.
This will bring compat issue with old version backend.
Signed-off-by: Chen Hanxiao <chenhanx...@gmail.com>
---
hw/net/vhost_net.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index f2d49ad..3819e65 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -425,11 +425,17 @@ int vhost_set_vring_enable(NetClientState *nc, int enable)
{
VHostNetState *net = get_vhost_net(nc);
const VhostOps *vhost_ops = net->dev.vhost_ops;
-
- nc->vring_enable = enable;
+ int ret;
if (vhost_ops && vhost_ops->vhost_set_vring_enable) {
- return vhost_ops->vhost_set_vring_enable(&net->dev, enable);
+ ret = vhost_ops->vhost_set_vring_enable(&net->dev, enable);
+ if (ret == 0) {
+ nc->vring_enable = enable;
+ } else {
+ nc->vring_enable = false;
+ }
+
+ return ret;
}
return 0;
--
1.8.3.1
