netdev - Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for virtio_net

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Date:   Tue, 20 Oct 2020 15:50:59 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eli Cohen <elic@...dia.com>
Cc:     wenxu@...oud.cn, netdev@...r.kernel.org, eli@...lanox.com
Subject: Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for
 virtio_net_config


On 2020/10/20 下午3:44, Eli Cohen wrote:
> On Tue, Oct 20, 2020 at 10:03:00AM +0800, Jason Wang wrote:
>> On 2020/10/19 下午5:07, wenxu@...oud.cn wrote:
>>> From: wenxu <wenxu@...oud.cn>
>>>
>>> Qemu get virtio_net_config from the vdpa driver. So The vdpa driver
>>> should set the VIRTIO_NET_S_LINK_UP flag to virtio_net_config like
>>> vdpa_sim. Or the link of virtio net NIC in the virtual machine will
>>> never up.
>>>
>>> Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
>>> Signed-off-by: wenxu <wenxu@...oud.cn>
>>> ---
>>>    drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 ++
>>>    1 file changed, 2 insertions(+)
>>>
>>> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>>> index 74264e59..af6c74c 100644
>>> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
>>> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>>> @@ -1537,6 +1537,8 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
>>>    	ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
>>>    	ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
>>>    					     ndev->mtu);
>>> +	ndev->config.status = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
>>> +					       VIRTIO_NET_S_LINK_UP);
>>>    	return err;
>>>    }
>>
>> Other than the small issue pointed out by Jakub.
>>
>> Acked-by: Jason Wang <jasowang@...hat.com>
>>
>>
> I already posted a fix for this a while ago and Michael should merge it.
>
> https://lkml.org/lkml/2020/9/17/543


Aha, I just forget this.

It's queued here: 
https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git/commit/?h=linux-next

And with my ack actually.

Thanks