linux-kernel - Re: [PATCH v5 3/6] vduse: add vq group support

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Message-ID: <CAJaqyWdeA5xcozCsaYD3_bQ6riN1pdDGHLpMGjU7ejZmNZ4qig@mail.gmail.com>
Date: Mon, 29 Sep 2025 07:55:59 +0200
From: Eugenio Perez Martin <eperezma@...hat.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Yongji Xie <xieyongji@...edance.com>, linux-kernel@...r.kernel.org, 
	Maxime Coquelin <mcoqueli@...hat.com>, Stefano Garzarella <sgarzare@...hat.com>, 
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Cindy Lu <lulu@...hat.com>, 
	virtualization@...ts.linux.dev, Laurent Vivier <lvivier@...hat.com>, jasowang@...hat.com
Subject: Re: [PATCH v5 3/6] vduse: add vq group support

On Fri, Sep 26, 2025 at 5:27 PM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Fri, Sep 26, 2025 at 12:14:29PM +0200, Eugenio Pérez wrote:
> > @@ -1859,6 +1894,7 @@ static int vduse_create_dev(struct vduse_dev_config *config,
> >       dev->device_features = config->features;
> >       dev->device_id = config->device_id;
> >       dev->vendor_id = config->vendor_id;
> > +     dev->ngroups = (dev->api_version < 1) ? 1 : config->ngroups;
>
> Is this < 1 same as VDUSE_API_VERSION_1? If so, maybe use that?
>

The macro for v0 is called VDUSE_API_VERSION, so I think it is less
intuitive to put:
dev->api_version == VDUSE_API_VERSION

But I'm ok with the change if you want.