From: Adrian Moreno <amorenoz@redhat.com>
Date: Sat, 25 Jan 2020 08:52:16 +0000 (+0100)
Subject: vhost: fix packed virtqueue ready condition
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c5a910dd92ecbad24f86b4c59b4ff8105b5149fd;p=dpdk.git

vhost: fix packed virtqueue ready condition

Consider a virtqueue ready when, apart from the descriptor area,
both event suppression areas have been mapped.

Fixes: 2d1541e2b6b3 ("vhost: add vring address setup for packed queues")
Cc: stable@dpdk.org

Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
---

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 69b84a8820..c9cc4d6489 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1298,7 +1298,8 @@ vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
 		return false;
 
 	if (vq_is_packed(dev))
-		rings_ok = !!vq->desc_packed;
+		rings_ok = vq->desc_packed && vq->driver_event &&
+			vq->device_event;
 	else
 		rings_ok = vq->desc && vq->avail && vq->used;