[dpdk-dev] [PATCH] vhost: fix the inflight resubmit check

[Jin Yu <jin.yu@intel.com>]

The frontend may not send the get_inflight_fd and
set_inflight_fd although we negotiate the protocol
feature. When we meet this situation just return OK.

Fixes: ad0a4ae491fe ("vhost: checkout resubmit inflight information")
Cc: stable@dpdk.org

Signed-off-by: Jin Yu <jin.yu@intel.com>
---
 lib/librte_vhost/vhost_user.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0cfb8b792..eb0f27c29 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1629,8 +1629,11 @@ vhost_check_queue_inflights_split(struct virtio_net *dev,
 	    (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
 		return RTE_VHOST_MSG_RESULT_OK;
 
+	/* The frontend may still not support the inflight feature
+	 * although we negotiate the protocol feature.
+	 */
 	if ((!vq->inflight_split))
-		return RTE_VHOST_MSG_RESULT_ERR;
+		return RTE_VHOST_MSG_RESULT_OK;
 
 	if (!vq->inflight_split->version) {
 		vq->inflight_split->version = INFLIGHT_VERSION;
@@ -1710,8 +1713,11 @@ vhost_check_queue_inflights_packed(struct virtio_net *dev,
 	    (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
 		return RTE_VHOST_MSG_RESULT_OK;
 
+	/* The frontend may still not support the inflight feature
+	 * although we negotiate the protocol feature.
+	 */
 	if ((!vq->inflight_packed))
-		return RTE_VHOST_MSG_RESULT_ERR;
+		return RTE_VHOST_MSG_RESULT_OK;
 
 	if (!vq->inflight_packed->version) {
 		vq->inflight_packed->version = INFLIGHT_VERSION;
-- 
2.17.2