[dpdk-stable] patch 'net/virtio_user: fix first queue pair without multiqueue' has been queued to stable release 16.07.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 16.07.1

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

Thanks.

	--yliu

---
>From 4128f24fe4933a2165ef2258f7fc06fd0ff7b11b Mon Sep 17 00:00:00 2001
From: Jianfeng Tan <jianfeng.tan at intel.com>
Date: Tue, 27 Sep 2016 19:11:04 +0000
Subject: [PATCH] net/virtio_user: fix first queue pair without multiqueue

[ upstream commit 33a290899dd2b6e2e26e8e5c33d08979f8315d18 ]

When virtio_user is used with OVS-DPDK (with mq disabled), it cannot
receive any packets. This is because no queue is enabled at all when
mq is disabled.

To fix it, we should consistently make sure the 1st queue is enabled,
which is also the behaviour QEMU takes.

Fixes: 37a7eb2ae816 ("net/virtio-user: add device emulation layer")

Reported-by: Ning Li <lining18 at jd.com>
Signed-off-by: Jianfeng Tan <jianfeng.tan at intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
 drivers/net/virtio/virtio_user/virtio_user_dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 376c9cf..bf1155c 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -131,6 +131,9 @@ virtio_user_start_device(struct virtio_user_dev *dev)
 		}
 	}
 
+	/* we enable the 1st queue pair by default. */
+	vhost_user_enable_queue_pair(dev->vhostfd, 0, 1);
+
 	/* After setup all virtqueues, we need to set_features so that these
 	 * features can be set into each virtqueue in vhost side. And before
 	 * that, make sure VHOST_USER_F_PROTOCOL_FEATURES is added if mq is
-- 
1.9.0