linux-kernel - Re: [PATCH v8 2/3] vdpa: Remove wrong doc of VHOST_VDPA

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Message-ID: <CACGkMEsMbXyXY94dB2NW_uUK=sXQNd7LTRBgOQVE=zMzHA69Gw@mail.gmail.com>
Date:   Fri, 19 Aug 2022 08:56:05 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eugenio Pérez <eperezma@...hat.com>
Cc:     virtualization <virtualization@...ts.linux-foundation.org>,
        "Michael S. Tsirkin" <mst@...hat.com>, kvm <kvm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, ecree.xilinx@...il.com,
        "Dawar, Gautam" <gautam.dawar@....com>,
        Zhang Min <zhang.min9@....com.cn>,
        Pablo Cascon Katchadourian <pabloc@...inx.com>,
        "Uminski, Piotr" <Piotr.Uminski@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Kamde, Tanuj" <tanuj.kamde@....com>,
        Zhu Lingshan <lingshan.zhu@...el.com>,
        Martin Petrus Hubertus Habets <martinh@...inx.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Laurent Vivier <lvivier@...hat.com>,
        Martin Porter <martinpo@...inx.com>,
        Harpreet Singh Anand <hanand@...inx.com>,
        Eli Cohen <elic@...dia.com>, Cindy Lu <lulu@...hat.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        Parav Pandit <parav@...dia.com>,
        Longpeng <longpeng2@...wei.com>,
        Wu Zongyong <wuzongyong@...ux.alibaba.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Dinan Gunawardena <dinang@...inx.com>,
        Xie Yongji <xieyongji@...edance.com>
Subject: Re: [PATCH v8 2/3] vdpa: Remove wrong doc of VHOST_VDPA_SUSPEND ioctl

On Thu, Aug 11, 2022 at 9:54 PM Eugenio Pérez <eperezma@...hat.com> wrote:
>
> It was a leftover from previous versions.
>
> Signed-off-by: Eugenio Pérez <eperezma@...hat.com>

Acked-by: Jason Wang <jasowang@...hat.com>

> ---
>  include/linux/vdpa.h       |  2 +-
>  include/uapi/linux/vhost.h | 15 +++++----------
>  2 files changed, 6 insertions(+), 11 deletions(-)
>
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index d282f464d2f1..6c4e6ea7f7eb 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -218,7 +218,7 @@ struct vdpa_map_file {
>   * @reset:                     Reset device
>   *                             @vdev: vdpa device
>   *                             Returns integer: success (0) or error (< 0)
> - * @suspend:                   Suspend or resume the device (optional)
> + * @suspend:                   Suspend the device (optional)
>   *                             @vdev: vdpa device
>   *                             Returns integer: success (0) or error (< 0)
>   * @get_config_size:           Get the size of the configuration space includes
> diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
> index 6d9f45163155..89fcb2afe472 100644
> --- a/include/uapi/linux/vhost.h
> +++ b/include/uapi/linux/vhost.h
> @@ -171,17 +171,12 @@
>  #define VHOST_VDPA_SET_GROUP_ASID      _IOW(VHOST_VIRTIO, 0x7C, \
>                                              struct vhost_vring_state)
>
> -/* Suspend or resume a device so it does not process virtqueue requests anymore
> +/* Suspend a device so it does not process virtqueue requests anymore
>   *
> - * After the return of ioctl with suspend != 0, the device must finish any
> - * pending operations like in flight requests. It must also preserve all the
> - * necessary state (the virtqueue vring base plus the possible device specific
> - * states) that is required for restoring in the future. The device must not
> - * change its configuration after that point.
> - *
> - * After the return of ioctl with suspend == 0, the device can continue
> - * processing buffers as long as typical conditions are met (vq is enabled,
> - * DRIVER_OK status bit is enabled, etc).
> + * After the return of ioctl the device must finish any pending operations. It
> + * must also preserve all the necessary state (the virtqueue vring base plus
> + * the possible device specific states) that is required for restoring in the
> + * future. The device must not change its configuration after that point.
>   */
>  #define VHOST_VDPA_SUSPEND             _IOW(VHOST_VIRTIO, 0x7D, int)
>
> --
> 2.31.1
>