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/openbmc/linux/drivers/vdpa/mlx5/net/ |
H A D | mlx5_vnet.c | diff 3176e974a750d6b700a10ffba0ec18d5a884fade Thu Oct 01 15:18:31 CDT 2020 Si-Wei Liu <si-wei.liu@oracle.com> vdpa/mlx5: should keep avail_index despite device status
A VM with mlx5 vDPA has below warnings while being reset:
vhost VQ 0 ring restore failed: -1: Resource temporarily unavailable (11) vhost VQ 1 ring restore failed: -1: Resource temporarily unavailable (11)
We should allow userspace emulating the virtio device be able to get to vq's avail_index, regardless of vDPA device status. Save the index that was last seen when virtq was stopped, so that userspace doesn't complain.
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com> Link: https://lore.kernel.org/r/1601583511-15138-1-git-send-email-si-wei.liu@oracle.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Eli Cohen <elic@nvidia.com>
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