linux-kernel - Re: [PATCH RFC 3/3] virtio_ccw: rev 1 devices set VIRTIO_F_VERSION

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Message-ID: <20141204185914.4e989a7a.cornelia.huck@de.ibm.com>
Date:	Thu, 4 Dec 2014 18:59:14 +0100
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	David Hildenbrand <dahi@...ux.vnet.ibm.com>,
	virtualization@...ts.linux-foundation.org,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-s390@...r.kernel.org
Subject: Re: [PATCH RFC 3/3] virtio_ccw: rev 1 devices set
 VIRTIO_F_VERSION_1

On Thu, 4 Dec 2014 19:26:50 +0200
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> What does it mean if rev 1 device does not set
> VIRTIO_F_VERSION_1? E.g. is it native endian?
> 
> Let's not even try to drive such devices:
> skip attempts to finalize features or set status.

Why not set status_failed?

> virtio core will detect this and bail out.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  drivers/s390/kvm/virtio_ccw.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 

I'm not sure yet whether I like this approach. I'll think about it over
the weekend.

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