On 10/29/18 6:28 AM, Tiwei Bie wrote:
When driver resets the device, virtio-user just needs to send
GET_VRING_BASE messages to stop the vhost backend, and that's
what QEMU does. With this change, we won't need to set owner
when starting virtio-user device anymore. This will help us to
get rid of below error message on startup:

vhost_kernel_ioctl(): VHOST_SET_OWNER failed: Device or resource busy

Fixes: bce7e9050f9b ("net/virtio-user: fix start with kernel vhost")
Fixes: 0d6a8752ac9d ("net/virtio-user: fix crash as features change")
Cc: sta...@dpdk.org

Signed-off-by: Tiwei Bie <tiwei....@intel.com>
---
  .../net/virtio/virtio_user/virtio_user_dev.c  | 22 ++++++++++++-------
  1 file changed, 14 insertions(+), 8 deletions(-)

Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com>

Thanks,
Maxime

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