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Subject: Re: [PATCH V3 1/6] vDPA/ifcvf: get_vendor_id returns a device
 specific vendor id
To:     Zhu Lingshan <lingshan.zhu@intel.com>, mst@redhat.com,
        lulu@redhat.com, leonro@nvidia.com
Cc:     virtualization@lists.linux-foundation.org, netdev@vger.kernel.org,
        kvm@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20210310090052.4762-1-lingshan.zhu@intel.com>
 <20210310090052.4762-2-lingshan.zhu@intel.com>
From:   Jason Wang <jasowang@redhat.com>
Message-ID: <ff5fc8f9-f886-bd2a-60cc-771c628c6c4b@redhat.com>
Date:   Thu, 11 Mar 2021 11:23:00 +0800
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On 2021/3/10 5:00 下午, Zhu Lingshan wrote:
> In this commit, ifcvf_get_vendor_id() will return
> a device specific vendor id of the probed pci device
> than a hard code.
>
> Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
> ---
>   drivers/vdpa/ifcvf/ifcvf_main.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> index fa1af301cf55..e501ee07de17 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -324,7 +324,10 @@ static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
>   
>   static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
>   {
> -	return IFCVF_SUBSYS_VENDOR_ID;
> +	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
> +	struct pci_dev *pdev = adapter->pdev;
> +
> +	return pdev->subsystem_vendor;
>   }


While at this, I wonder if we can do something similar in 
get_device_id() if it could be simple deduced from some simple math from 
the pci device id?

Thanks


>   
>   static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)