linux-kernel - Re: [PATCH v2 10/17] vdpa_sim: store parsed MAC address in a buffer

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Date:   Mon, 30 Nov 2020 11:20:24 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Stefano Garzarella <sgarzare@...hat.com>,
        virtualization@...ts.linux-foundation.org
Cc:     Stefan Hajnoczi <stefanha@...hat.com>,
        linux-kernel@...r.kernel.org, Laurent Vivier <lvivier@...hat.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        "Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>
Subject: Re: [PATCH v2 10/17] vdpa_sim: store parsed MAC address in a buffer


On 2020/11/26 下午10:49, Stefano Garzarella wrote:
> As preparation for the next patches, we store the MAC address,
> parsed during the vdpasim_create(), in a buffer that will be used
> to fill 'config' together with other configurations.
>
> Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
> ---
>   drivers/vdpa/vdpa_sim/vdpa_sim.c | 10 +++++++---
>   1 file changed, 7 insertions(+), 3 deletions(-)


Acked-by: Jason Wang <jasowang@...hat.com>


>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index b84d9acd130c..9f2ca3a77025 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -29,6 +29,8 @@ static char *macaddr;
>   module_param(macaddr, charp, 0);
>   MODULE_PARM_DESC(macaddr, "Ethernet MAC address");
>   
> +u8 macaddr_buf[ETH_ALEN];
> +
>   struct vdpasim_virtqueue {
>   	struct vringh vring;
>   	struct vringh_kiov iov;
> @@ -386,13 +388,13 @@ static struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
>   		goto err_iommu;
>   
>   	if (macaddr) {
> -		mac_pton(macaddr, vdpasim->config.mac);
> -		if (!is_valid_ether_addr(vdpasim->config.mac)) {
> +		mac_pton(macaddr, macaddr_buf);
> +		if (!is_valid_ether_addr(macaddr_buf)) {
>   			ret = -EADDRNOTAVAIL;
>   			goto err_iommu;
>   		}
>   	} else {
> -		eth_random_addr(vdpasim->config.mac);
> +		eth_random_addr(macaddr_buf);
>   	}
>   
>   	for (i = 0; i < dev_attr->nvqs; i++)
> @@ -528,6 +530,8 @@ static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
>   
>   	config->mtu = cpu_to_vdpasim16(vdpasim, 1500);
>   	config->status = cpu_to_vdpasim16(vdpasim, VIRTIO_NET_S_LINK_UP);
> +	memcpy(config->mac, macaddr_buf, ETH_ALEN);
> +
>   	return 0;
>   }
>