[PATCH] vhost: fix vdpa driver multi-queue initialization failure

[Hao Chen]

When 'virtio_is_Ready' returns 1, 'vdpa_dev->ops->dev_conf' will be
called, and the vdpa driver called 'rte_vhost_get_vhost_vring' to
get the vring addr info from 'vhost_devices->virtqueue[]'.
virtio_is_ready's nr_vring is VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY(2),
multi-queue's nr_vring is greater than 2.
Only 'vhost_devices->virtqueue[0]' and 'vhost_devices->virtqueue[1]'
are obtained in the for loop. Other queues of multiple queues cannot
obtain the corresponding 'vhost_devices->virtqueue[i]', which will
cause 'vdpa_dev->ops->dev_conf' to obtain QEMU vring addr information
from 'vhost_devices->virtqueue[i]' failed.
Here, nr_ving is modified to dev->nr_vring, so that multiple queues
can obtain the corresponding 'vhost_devices->virtqueue[i]'.

Signed-off-by: Hao Chen <chenh at yusur.tech>
---
 lib/vhost/vhost_user.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 9902ae9944..9249eafc06 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -1473,7 +1473,7 @@ virtio_is_ready(struct virtio_net *dev)
 	if (dev->nr_vring < nr_vring)
 		return 0;
 
-	for (i = 0; i < nr_vring; i++) {
+	for (i = 0; i < dev->nr_vring; i++) {
 		vq = dev->virtqueue[i];
 
 		if (!vq_is_ready(dev, vq))
-- 
2.27.0