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virtio: record the maximum queue num supported by the device.

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virtio-net can display the maximum (supported by hardware) ring size in
ethtool -g eth0.

When the subsequent patch implements vring reset, it can judge whether
the ring size passed by the driver is legal based on this.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-2-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo
2022-08-01 14:38:21 +08:00
committed by Michael S. Tsirkin
parent 0b6fd46ec5
commit da80296183
9 changed files with 18 additions and 0 deletions
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3
drivers/s390/virtio/virtio_ccw.c
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@@ -530,6 +530,9 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev,
err = -ENOMEM;
goto out_err;
}
vq->num_max = info->num;
/* it may have been reduced */
info->num = virtqueue_get_vring_size(vq);