[dpdk-stable] patch 'vhost: fix silent queue enabling with legacy guests' has been queued to LTS release 18.11.2

[Kevin Traynor]

Hi,

FYI, your patch has been queued to LTS release 18.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/13/19. 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-queue

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable-queue/commit/467038a96eb99295286f38bd673d82ec7fb04f5e

Thanks.

Kevin Traynor

---
>From 467038a96eb99295286f38bd673d82ec7fb04f5e Mon Sep 17 00:00:00 2001
From: Ilya Maximets <i.maximets at samsung.com>
Date: Fri, 12 Apr 2019 16:09:49 +0300
Subject: [PATCH] vhost: fix silent queue enabling with legacy guests

[ upstream commit 966027b4b3a3e1059bf31ca07340914f6b8bb53a ]

vhost should notify the application in case of all vring state changes.

In general, application should not care about negotiation of
VHOST_USER_F_PROTOCOL_FEATURES. Protocol details like this should
be hidden by the vhost library.

With this patch applications like OVS will be able to assume that
all vrings disabled by default and only process 'vring_state_changed'
events.

Fixes: 321203a54ba7 ("vhost: enable rings at the right time")

Signed-off-by: Ilya Maximets <i.maximets at samsung.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 lib/librte_vhost/vhost_user.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 7952ef700..5552f8bbf 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1232,6 +1232,10 @@ vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
 	 * the SET_VRING_ENABLE message.
 	 */
-	if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
+	if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
 		vq->enabled = 1;
+		if (dev->notify_ops->vring_state_changed)
+			dev->notify_ops->vring_state_changed(
+				dev->vid, file.index, 1);
+	}
 
 	if (vq->kickfd >= 0)
-- 
2.20.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2019-05-08 11:05:06.804225937 +0100
+++ 0019-vhost-fix-silent-queue-enabling-with-legacy-guests.patch	2019-05-08 11:05:05.796933452 +0100
@@ -1 +1 @@
-From 966027b4b3a3e1059bf31ca07340914f6b8bb53a Mon Sep 17 00:00:00 2001
+From 467038a96eb99295286f38bd673d82ec7fb04f5e Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 966027b4b3a3e1059bf31ca07340914f6b8bb53a ]
+
@@ -17 +18,0 @@
-Cc: stable at dpdk.org
@@ -26 +27 @@
-index 23beed97d..c9e29ece8 100644
+index 7952ef700..5552f8bbf 100644