patch 'vhost: reset packets count when not ready' has been queued to stable release 24.11.2

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 24.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/17/25. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/5198bb13959d8cdaafac0a3ef0b9f1ecfbc14792

Thanks.

Kevin

---
>From 5198bb13959d8cdaafac0a3ef0b9f1ecfbc14792 Mon Sep 17 00:00:00 2001
From: Maxime Coquelin <maxime.coquelin at redhat.com>
Date: Thu, 16 Jan 2025 10:54:14 +0100
Subject: [PATCH] vhost: reset packets count when not ready

[ upstream commit 8b96508af6021d868052545a76ef2ce5219b7702 ]

This patch fixes the rte_vhost_dequeue_burst return value
when the virtqueue is not ready. Without it, a discrepancy
between the packet array and its size is faced by the caller
of this API when the virtqueue is not ready.

Fixes: 9fc93a1e2320 ("vhost: fix virtqueue access check in datapath")

Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Reviewed-by: David Marchand <david.marchand at redhat.com>
Reviewed-by: Chenbo Xia <chenbox at nvidia.com>
---
 lib/vhost/virtio_net.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 2ac5bc29a3..d85c0c9d42 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -3633,4 +3633,6 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
 
 		virtio_dev_vring_translate(dev, vq);
+
+		count = 0;
 		goto out_no_unlock;
 	}
-- 
2.48.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-02-12 17:29:35.297422934 +0000
+++ 0006-vhost-reset-packets-count-when-not-ready.patch	2025-02-12 17:29:34.132944629 +0000
@@ -1 +1 @@
-From 8b96508af6021d868052545a76ef2ce5219b7702 Mon Sep 17 00:00:00 2001
+From 5198bb13959d8cdaafac0a3ef0b9f1ecfbc14792 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 8b96508af6021d868052545a76ef2ce5219b7702 ]
+
@@ -12 +13,0 @@
-Cc: stable at dpdk.org