netdev - Re: [PATCH vhost 18/23] vdpa/mlx5: Forward error in suspend/resume device

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Date: Sun, 23 Jun 2024 19:19:24 +0800
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
To: Dragos Tatulea <dtatulea@...dia.com>, "Michael S. Tsirkin"
 <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
 Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Eugenio Pérez
 <eperezma@...hat.com>, Saeed Mahameed <saeedm@...dia.com>,
 Leon Romanovsky <leon@...nel.org>, Tariq Toukan <tariqt@...dia.com>,
 Si-Wei Liu <si-wei.liu@...cle.com>
Cc: virtualization@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
 Cosmin Ratiu <cratiu@...dia.com>
Subject: Re: [PATCH vhost 18/23] vdpa/mlx5: Forward error in suspend/resume
 device

在 2024/6/17 23:07, Dragos Tatulea 写道:
> Start using the suspend/resume_vq() error return codes previously added.
> 
> Signed-off-by: Dragos Tatulea <dtatulea@...dia.com>
> Reviewed-by: Cosmin Ratiu <cratiu@...dia.com>
> ---
>   drivers/vdpa/mlx5/net/mlx5_vnet.c | 12 ++++++++----
>   1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index f5d5b25cdb01..0e1c1b7ff297 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -3436,22 +3436,25 @@ static int mlx5_vdpa_suspend(struct vdpa_device *vdev)
>   {
>   	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
>   	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
> +	int err;

Reverse Christmas Tree?

Reviewed-by: Zhu Yanjun <yanjun.zhu@...ux.dev>

Zhu Yanjun
>   
>   	mlx5_vdpa_info(mvdev, "suspending device\n");
>   
>   	down_write(&ndev->reslock);
>   	unregister_link_notifier(ndev);
> -	suspend_vqs(ndev);
> +	err = suspend_vqs(ndev);
>   	mlx5_vdpa_cvq_suspend(mvdev);
>   	mvdev->suspended = true;
>   	up_write(&ndev->reslock);
> -	return 0;
> +
> +	return err;
>   }
>   
>   static int mlx5_vdpa_resume(struct vdpa_device *vdev)
>   {
>   	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
>   	struct mlx5_vdpa_net *ndev;
> +	int err;
>   
>   	ndev = to_mlx5_vdpa_ndev(mvdev);
>   
> @@ -3459,10 +3462,11 @@ static int mlx5_vdpa_resume(struct vdpa_device *vdev)
>   
>   	down_write(&ndev->reslock);
>   	mvdev->suspended = false;
> -	resume_vqs(ndev);
> +	err = resume_vqs(ndev);
>   	register_link_notifier(ndev);
>   	up_write(&ndev->reslock);
> -	return 0;
> +
> +	return err;
>   }
>   
>   static int mlx5_set_group_asid(struct vdpa_device *vdev, u32 group,
>