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virtio-ccw: fix ring sizing

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Current code seems to assume ring size is
always decreased but this is not required by spec:
what spec says is just that size can not exceed
the maximum. Fix it up.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <1484256243-1982-1-git-send-email-mst@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2017-01-12 23:26:22 +02:00 • committed by Cornelia Huck
parent 857cc71985
commit 8c797e758a
3 changed files with 7 additions and 1 deletions
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5
hw/virtio/virtio.c
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@ -1262,6 +1262,11 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n)
return vdev->vq[n].vring.num;
}
int virtio_queue_get_max_num(VirtIODevice *vdev, int n)
{
return vdev->vq[n].vring.num_default;
}
int virtio_get_num_queues(VirtIODevice *vdev)
{
int i;