[dpdk-dev] [PATCH] net/virtio: fix kernel set features for multi-queue devices

[Thierry Herbelot]

Restore the original code, where VHOST_SET_FEATURES is applied to
all vhostfds of the device.

Fixes: cc0151b34dee ("net/virtio: add virtio-user features ops")
Cc: sta...@dpdk.org
Cc: Maxime Coquelin <maxime.coque...@redhat.com>
Cc: Chenbo Xia <chenbo....@intel.com>

Signed-off-by: Thierry Herbelot <thierry.herbe...@6wind.com>
---
 drivers/net/virtio/virtio_user/vhost_kernel.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel.c 
b/drivers/net/virtio/virtio_user/vhost_kernel.c
index ad46f10a9300..d65f89e1fc16 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel.c
@@ -158,6 +158,8 @@ static int
 vhost_kernel_set_features(struct virtio_user_dev *dev, uint64_t features)
 {
        struct vhost_kernel_data *data = dev->backend_data;
+       uint32_t i;
+       int ret;
 
        /* We don't need memory protection here */
        features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
@@ -166,7 +168,16 @@ vhost_kernel_set_features(struct virtio_user_dev *dev, 
uint64_t features)
        features &= ~VHOST_KERNEL_HOST_OFFLOADS_MASK;
        features &= ~(1ULL << VIRTIO_NET_F_MQ);
 
-       return vhost_kernel_ioctl(data->vhostfds[0], VHOST_SET_FEATURES, 
&features);
+       for (i = 0; i < dev->max_queue_pairs; ++i) {
+               if (data->vhostfds[i] < 0)
+                       continue;
+
+               ret = vhost_kernel_ioctl(data->vhostfds[i], VHOST_SET_FEATURES, 
&features);
+               if (ret < 0)
+                       return ret;
+       }
+
+       return 0;
 }
 
 static int
-- 
2.29.2