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Re: [Qemu-devel] [PATCH 1/2] virtio: set guest_features before calling s
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] virtio: set guest_features before calling set_features callback, not after |
Date: |
Mon, 23 Apr 2012 16:06:02 +0300 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Apr 23, 2012 at 02:26:23PM +0300, Alon Levy wrote:
> We could drop the features parameter but that's a little more work and
> it's not really needed.
>
> Signed-off-by: Alon Levy <address@hidden>
I think it's fine the way it is but if you want callbacks to use
vdev->guest_features remove the features parameter.
Having both is just confusing.
> ---
> hw/virtio.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/virtio.c b/hw/virtio.c
> index 064aecf..aeddc81 100644
> --- a/hw/virtio.c
> +++ b/hw/virtio.c
> @@ -770,10 +770,10 @@ int virtio_set_features(VirtIODevice *vdev, uint32_t
> val)
> bool bad = (val & ~supported_features) != 0;
>
> val &= supported_features;
> + vdev->guest_features = val;
> if (vdev->set_features) {
> vdev->set_features(vdev, val);
> }
> - vdev->guest_features = val;
> return bad ? -1 : 0;
> }
>
> --
> 1.7.10
>