linux-kernel - Re: [PATCH 5/6] vdpa: introduce virtio pci driver

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Date:   Mon, 8 Jun 2020 05:45:31 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        rob.miller@...adcom.com, lingshan.zhu@...el.com,
        eperezma@...hat.com, lulu@...hat.com, shahafs@...lanox.com,
        hanand@...inx.com, mhabets@...arflare.com, gdawar@...inx.com,
        saugatm@...inx.com, vmireyno@...vell.com,
        zhangweining@...jie.com.cn, eli@...lanox.com
Subject: Re: [PATCH 5/6] vdpa: introduce virtio pci driver

On Mon, Jun 08, 2020 at 05:43:58PM +0800, Jason Wang wrote:
> > 
> > > Looking at
> > > pci_match_one_device() it checks both subvendor and subdevice there.
> > > 
> > > Thanks
> > 
> > But IIUC there is no guarantee that driver with a specific subvendor
> > matches in presence of a generic one.
> > So either IFC or virtio pci can win, whichever binds first.
> 
> 
> I'm not sure I get there. But I try manually bind IFCVF to qemu's
> virtio-net-pci, and it fails.
> 
> Thanks

Right but the reverse can happen: virtio-net can bind to IFCVF first.

-- 
MST