[Qemu-devel] [PATCH v2 2/3] vhost-user: fix ioeventfd_enabled

[Li Qiang]

Currently, the vhost-user-test assumes the eventfd is available.
However it's not true because the accel is qtest. So the
'vhost_set_vring_file' will not add fds to the msg and the server
side of vhost-user-test will be broken. The bug is in 'ioeventfd_enabled'.
We should make this function return true if not using kvm accel.

Signed-off-by: Li Qiang <address@hidden>
---
v2: change the fix in 'ioeventfd_enabled' per Paolo's review

 hw/virtio/vhost-user.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index e09bed0e4a..564a31d12c 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -207,7 +207,7 @@ struct vhost_user {
 
 static bool ioeventfd_enabled(void)
 {
-    return kvm_enabled() && kvm_eventfds_enabled();
+    return !kvm_enabled() || kvm_eventfds_enabled();
 }
 
 static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
-- 
2.17.1