From: Stefano Garzarella <[email protected]> vhost_vdpa_set_vring_ready() could already fail, but if Linux's patch [1] will be merged, it may fail with more chance if userspace does not activate virtqueues before DRIVER_OK when VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK is not negotiated.
So better check its return value anyway. [1] https://lore.kernel.org/virtualization/[email protected]/T/#u Acked-by: Eugenio Pérez <[email protected]> Acked-by: Jason Wang <[email protected]> Signed-off-by: Stefano Garzarella <[email protected]> Message-Id: <[email protected]> Reviewed-by: Philippe Mathieu-Daudé <[email protected]> Reviewed-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> --- net/vhost-vdpa.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 85e73dd6a7..eda714d1a4 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -399,7 +399,10 @@ static int vhost_vdpa_net_data_load(NetClientState *nc) } for (int i = 0; i < v->dev->nvqs; ++i) { - vhost_vdpa_set_vring_ready(v, i + v->dev->vq_index); + int ret = vhost_vdpa_set_vring_ready(v, i + v->dev->vq_index); + if (ret < 0) { + return ret; + } } return 0; } @@ -1238,7 +1241,10 @@ static int vhost_vdpa_net_cvq_load(NetClientState *nc) assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); - vhost_vdpa_set_vring_ready(v, v->dev->vq_index); + r = vhost_vdpa_set_vring_ready(v, v->dev->vq_index); + if (unlikely(r < 0)) { + return r; + } if (v->shadow_vqs_enabled) { n = VIRTIO_NET(v->dev->vdev); @@ -1277,7 +1283,10 @@ static int vhost_vdpa_net_cvq_load(NetClientState *nc) } for (int i = 0; i < v->dev->vq_index; ++i) { - vhost_vdpa_set_vring_ready(v, i); + r = vhost_vdpa_set_vring_ready(v, i); + if (unlikely(r < 0)) { + return r; + } } return 0; -- MST
