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    SubjectRe: [PATCH 3/3] virtio/vdpa: Clear the available index during probe
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    在 2021/6/1 上午12:05, Eli Cohen 写道:
    > Clear the available index as part of the initialization process to
    > clear and values that might be left from previous usage of the device.
    > For example, if the device was previously used by vhost_vdpa and now
    > probed by vhost_vdpa, you want to start with indices.
    >
    > Fixes: c043b4a8cf3b ("virtio: introduce a vDPA based transport")
    > Signed-off-by: Eli Cohen <elic@nvidia.com>
    > ---


    Acked-by: Jason Wang <jasowang@redhat.com>

    Note that we probably need a follow-up fixes for vp_vdpa driver.

    I will post it soon.

    Thanks


    > drivers/virtio/virtio_vdpa.c | 6 ++++++
    > 1 file changed, 6 insertions(+)
    >
    > diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
    > index e28acf482e0c..32fb121a6ec4 100644
    > --- a/drivers/virtio/virtio_vdpa.c
    > +++ b/drivers/virtio/virtio_vdpa.c
    > @@ -142,6 +142,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
    > struct vdpa_callback cb;
    > struct virtqueue *vq;
    > u64 desc_addr, driver_addr, device_addr;
    > + struct vdpa_vq_state state = {0};
    > unsigned long flags;
    > u32 align, num;
    > int err;
    > @@ -191,6 +192,11 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
    > goto err_vq;
    > }
    >
    > + /* reset available index */
    > + err = ops->set_vq_state(vdpa, index, &state);
    > + if (err)
    > + goto err_vq;
    > +
    > ops->set_vq_ready(vdpa, index, 1);
    >
    > vq->priv = info;

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