Virtualization - Dec 2021 - [PATCH 7/7] vdpa/mlx5: Restore cur_num_vqs in case of failure in change_num_qps()

On Thu, Dec 2, 2021 at 3:58 AM Eli Cohen <elic at nvidia.com>
wrote:
>
> Restore ndev->cur_num_vqs to the original value in case change_num_qps()
> fails.
>
> Fixes: 52893733f2c5 ("vdpa/mlx5: Add multiqueue support")
> Signed-off-by: Eli Cohen <elic at nvidia.com>
Acked-by: Jason Wang <jasowang at redhat.com>
> ---
>  drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index 81a602ff68b5..baeff15d4b95 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -1552,6 +1552,8 @@ static int change_num_qps(struct mlx5_vdpa_dev
*mvdev, int newqps)
>         for (--i; i >= cur_qps; --i)
>                 teardown_vq(ndev, &ndev->vqs[i]);
>
> +       ndev->cur_num_vqs = 2 * cur_qps;
> +
>         return err;
>  }
>
> --
> 2.33.1
>