[dpdk-stable] patch 'vhost: fix dequeue zero copy with virtio1' has been queued to LTS release 16.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/28/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From ce6f6e73502e0d3e0d303c992883151d61475bbe Mon Sep 17 00:00:00 2001
From: Junjie Chen <junjie.j.chen at intel.com>
Date: Wed, 13 Dec 2017 11:50:56 -0500
Subject: [PATCH] vhost: fix dequeue zero copy with virtio1

[ upstream commit 803aeecef123877764aac56270180e920aea8863 ]

This fix dequeue zero copy can not work with Qemu
version >= 2.7. Since from Qemu 2.7 virtio device
use virtio-1 protocol, the zero copy code path
forget to add offset to buffer address.

Fixes: b0a985d1f340 ("vhost: add dequeue zero copy")

Signed-off-by: Junjie Chen <junjie.j.chen at intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Acked-by: Yuanhan Liu <yliu at fridaylinux.org>
---
 lib/librte_vhost/virtio_net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 0027f3933..83a0082e5 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -875,7 +875,8 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs,
 					desc->addr + desc_offset, cpy_len)))) {
 			cur->data_len = cpy_len;
 			cur->data_off = 0;
-			cur->buf_addr = (void *)(uintptr_t)desc_addr;
+			cur->buf_addr = (void *)(uintptr_t)(desc_addr
+				+ desc_offset);
 			cur->buf_physaddr = hpa;
 
 			/*
-- 
2.14.2