diff mbox series

[PULL,v2,42/53] vdpa net: follow VirtIO initialization properly at cvq isolation probing

Message ID 845ec38ae1578dd2d42ff15c9979f1bf44b23418.1696477105.git.mst@redhat.com
State New
Headers show
Series [PULL,v2,01/53] pci: SLT must be RO | expand

Commit Message

Michael S. Tsirkin Oct. 5, 2023, 3:45 a.m. UTC 
From: Eugenio Pérez <eperezma@redhat.com>

This patch solves a few issues.  The most obvious is that the feature
set was done previous to ACKNOWLEDGE | DRIVER status bit set.  Current
vdpa devices are permissive with this, but it is better to follow the
standard.

Fixes: 152128d646 ("vdpa: move CVQ isolation check to net_init_vhost_vdpa")
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230915170836.3078172-4-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 net/vhost-vdpa.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index b688877f90..939c984d5b 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -1345,8 +1345,7 @@  static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features,
     uint64_t backend_features;
     int64_t cvq_group;
     uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE |
-                     VIRTIO_CONFIG_S_DRIVER |
-                     VIRTIO_CONFIG_S_FEATURES_OK;
+                     VIRTIO_CONFIG_S_DRIVER;
     int r;
 
     ERRP_GUARD();
@@ -1361,15 +1360,22 @@  static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features,
         return 0;
     }
 
-    r = ioctl(device_fd, VHOST_SET_FEATURES, &features);
+    r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status);
     if (unlikely(r)) {
-        error_setg_errno(errp, errno, "Cannot set features");
+        error_setg_errno(errp, -r, "Cannot set device status");
         goto out;
     }
 
+    r = ioctl(device_fd, VHOST_SET_FEATURES, &features);
+    if (unlikely(r)) {
+        error_setg_errno(errp, -r, "Cannot set features");
+        goto out;
+    }
+
+    status |= VIRTIO_CONFIG_S_FEATURES_OK;
     r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status);
     if (unlikely(r)) {
-        error_setg_errno(errp, -r, "Cannot set status");
+        error_setg_errno(errp, -r, "Cannot set device status");
         goto out;
     }