[PATCH v4 8/8] vhost: improve vDPA blk device configure condition

[Andy Pei <andy.pei@intel.com>]

To support multi-queue, configure device 
after call fd of all queues are set.

Signed-off-by: Andy Pei <andy.pei@intel.com>
Signed-off-by: Huang Wei <wei.huang@intel.com>
---
 lib/vhost/vhost_user.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 0509025..3ede83f 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2965,6 +2965,7 @@ static int is_vring_iotlb(struct virtio_net *dev,
 	uint32_t vdpa_type = -1;
 	uint32_t request;
 	uint32_t i;
+	uint16_t blk_call_fd;
 
 	dev = get_device(vid);
 	if (dev == NULL)
@@ -3191,9 +3192,15 @@ static int is_vring_iotlb(struct virtio_net *dev,
 	if (!vdpa_dev)
 		goto out;
 
-	if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK
-		&& request != VHOST_USER_SET_VRING_CALL)
-		goto out;
+	if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK) {
+		if (request == VHOST_USER_SET_VRING_CALL) {
+			blk_call_fd = ctx.msg.payload.u64 & VHOST_USER_VRING_IDX_MASK;
+			if (blk_call_fd != dev->nr_vring - 1)
+				goto out;
+		} else {
+			goto out;
+		}
+	}
 
 	if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
 		if (vdpa_dev->ops->dev_conf(dev->vid))
-- 
1.8.3.1