netdev - Re: [PATCH v4 24/42] virtio_net: enable v1.0 support

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Date:	Wed, 26 Nov 2014 15:28:52 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Cornelia Huck <cornelia.huck@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, David Miller <davem@...emloft.net>,
	rusty@....ibm.com, nab@...ux-iscsi.org, pbonzini@...hat.com,
	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [PATCH v4 24/42] virtio_net: enable v1.0 support

On Wed, Nov 26, 2014 at 02:08:57PM +0100, Cornelia Huck wrote:
> On Tue, 25 Nov 2014 18:43:06 +0200
> "Michael S. Tsirkin" <mst@...hat.com> wrote:
> 
> > Now that we have completed 1.0 support, enable it in our driver.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > ---
> >  drivers/net/virtio_net.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> 
> Hm. The spec states that mac is driver-writable in the legacy case.
> Don't we need to fence writing it in virtnet_set_mac_address() in the
> virtio 1.0 case?

You are right. I'll add a patch to fix that one: we
should return -EOPNOTSUPP unless
	VIRTIO_NET_F_CTRL_MAC_ADDR or
	VERSION_1 is clear and VIRTIO_NET_F_MAC is set.


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