netdev - Re: [PATCH v2] vsock/virtio: set vsock frontend ready in virtio_vsock

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Date:   Tue, 20 Jul 2021 11:23:01 +0100
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     Xianting Tian <xianting.tian@...ux.alibaba.com>
Cc:     sgarzare@...hat.com, davem@...emloft.net, kuba@...nel.org,
        jasowang@...hat.com, kvm@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] vsock/virtio: set vsock frontend ready in
 virtio_vsock_probe()

On Tue, Jul 20, 2021 at 03:13:37PM +0800, Xianting Tian wrote:
> Add the missed virtio_device_ready() to set vsock frontend ready.
> 
> Signed-off-by: Xianting Tian <xianting.tian@...ux.alibaba.com>
> ---
>  net/vmw_vsock/virtio_transport.c | 2 ++
>  1 file changed, 2 insertions(+)

Please include a changelog when you send v2, v3, etc patches.

> 
> diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
> index e0c2c992a..dc834b8fd 100644
> --- a/net/vmw_vsock/virtio_transport.c
> +++ b/net/vmw_vsock/virtio_transport.c
> @@ -639,6 +639,8 @@ static int virtio_vsock_probe(struct virtio_device *vdev)
>  
>  	mutex_unlock(&the_virtio_vsock_mutex);
>  
> +	virtio_device_ready(vdev);

Why is this patch necessary?

The core virtio_dev_probe() code already calls virtio_device_ready for
us:

  static int virtio_dev_probe(struct device *_d)
  {
      ...
      err = drv->probe(dev);
      if (err)
          goto err;
  
      /* If probe didn't do it, mark device DRIVER_OK ourselves. */
      if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK))
          virtio_device_ready(dev);

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