[PATCH v3 16/28] net/vhost: use API to set max queue pairs

[Maxime Coquelin <maxime.coquelin@redhat.com>]

In order to support multiqueue with VDUSE, we need to
be able to limit the maximum number of queue pairs, to
avoid unnecessary memory consumption since the maximum
number of queue pairs need to be allocated at device
creation time, as opposed to Vhost-user which allocate
only when the frontend initialize them.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
---
 drivers/net/vhost/rte_eth_vhost.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index 62ef955ebc..8d37ec9775 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -1013,6 +1013,9 @@ vhost_driver_setup(struct rte_eth_dev *eth_dev)
 			goto drv_unreg;
 	}
 
+	if (rte_vhost_driver_set_max_queue_num(internal->iface_name, internal->max_queues))
+		goto drv_unreg;
+
 	if (rte_vhost_driver_callback_register(internal->iface_name,
 					       &vhost_ops) < 0) {
 		VHOST_LOG(ERR, "Can't register callbacks\n");
-- 
2.40.1