|
 |
24c150 |
From 4e7f13419c3c45563210e8aed01ebbdf0dd43a01 Mon Sep 17 00:00:00 2001
|
|
|
24c150 |
From: Si-Wei Liu <si-wei.liu@oracle.com>
|
|
|
24c150 |
Date: Fri, 6 May 2022 19:28:16 -0700
|
|
|
24c150 |
Subject: [PATCH 5/7] vhost-vdpa: backend feature should set only once
|
|
|
24c150 |
MIME-Version: 1.0
|
|
|
24c150 |
Content-Type: text/plain; charset=UTF-8
|
|
|
24c150 |
Content-Transfer-Encoding: 8bit
|
|
|
24c150 |
|
|
|
24c150 |
RH-Author: Cindy Lu <lulu@redhat.com>
|
|
|
24c150 |
RH-MergeRequest: 204: vdpa :sync the Multiqueue fixes for vhost-vDPA
|
|
|
24c150 |
RH-Commit: [5/7] 338375ebeab833b8ddd7c7f501aa348f28953778
|
|
|
24c150 |
RH-Bugzilla: 2095795
|
|
|
24c150 |
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
24c150 |
RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
|
|
|
24c150 |
RH-Acked-by: Jason Wang <jasowang@redhat.com>
|
|
|
24c150 |
|
|
|
24c150 |
The vhost_vdpa_one_time_request() branch in
|
|
|
24c150 |
vhost_vdpa_set_backend_cap() incorrectly sends down
|
|
|
24c150 |
ioctls on vhost_dev with non-zero index. This may
|
|
|
24c150 |
end up with multiple VHOST_SET_BACKEND_FEATURES
|
|
|
24c150 |
ioctl calls sent down on the vhost-vdpa fd that is
|
|
|
24c150 |
shared between all these vhost_dev's.
|
|
|
24c150 |
|
|
|
24c150 |
To fix it, send down ioctl only once via the first
|
|
|
24c150 |
vhost_dev with index 0. Toggle the polarity of the
|
|
|
24c150 |
vhost_vdpa_one_time_request() test should do the
|
|
|
24c150 |
trick.
|
|
|
24c150 |
|
|
|
24c150 |
Fixes: 4d191cfdc7de ("vhost-vdpa: classify one time request")
|
|
|
24c150 |
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
|
|
|
24c150 |
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
|
|
|
24c150 |
Acked-by: Jason Wang <jasowang@redhat.com>
|
|
|
24c150 |
Acked-by: Eugenio Pérez <eperezma@redhat.com>
|
|
|
24c150 |
Message-Id: <1651890498-24478-6-git-send-email-si-wei.liu@oracle.com>
|
|
|
24c150 |
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
|
|
|
24c150 |
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
|
|
|
24c150 |
(cherry picked from commit 6aee7e4233f6467f69531fcd352adff028f3f5ea)
|
|
|
24c150 |
Signed-off-by: Cindy Lu <lulu@redhat.com>
|
|
|
24c150 |
---
|
|
|
24c150 |
hw/virtio/vhost-vdpa.c | 2 +-
|
|
|
24c150 |
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
24c150 |
|
|
|
24c150 |
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
|
|
|
24c150 |
index 78da48a333..a9be24776a 100644
|
|
|
24c150 |
--- a/hw/virtio/vhost-vdpa.c
|
|
|
24c150 |
+++ b/hw/virtio/vhost-vdpa.c
|
|
|
24c150 |
@@ -525,7 +525,7 @@ static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev)
|
|
|
24c150 |
|
|
|
24c150 |
features &= f;
|
|
|
24c150 |
|
|
|
24c150 |
- if (vhost_vdpa_one_time_request(dev)) {
|
|
|
24c150 |
+ if (!vhost_vdpa_one_time_request(dev)) {
|
|
|
24c150 |
r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features);
|
|
|
24c150 |
if (r) {
|
|
|
24c150 |
return -EFAULT;
|
|
|
24c150 |
--
|
|
|
24c150 |
2.31.1
|
|
|
24c150 |
|