linux-kernel - Re: [PATCH v7 net-next] net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)

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Date:   Fri, 16 Apr 2021 11:08:36 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Dexuan Cui <decui@...rosoft.com>
Cc:     Haiyang Zhang <haiyangz@...rosoft.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        Wei Liu <liuwe@...rosoft.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "leon@...nel.org" <leon@...nel.org>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "bernd@...rovitsch.priv.at" <bernd@...rovitsch.priv.at>,
        "rdunlap@...radead.org" <rdunlap@...radead.org>,
        Shachar Raindel <shacharr@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: Re: [PATCH v7 net-next] net: mana: Add a driver for Microsoft Azure
 Network Adapter (MANA)

On Fri, 16 Apr 2021 17:58:45 +0000
Dexuan Cui <decui@...rosoft.com> wrote:

> > >
> > > This probably should be a separate patch.
> > > I think it is trying to address the case of VF discovery in Hyper-V/Azure where
> > > the reported
> > > VF from Hypervisor is bogus or confused.  
> > 
> > This is for the Multi vPorts feature of MANA driver, which allows one VF to
> > create multiple vPorts (NICs). They have the same PCI device and same VF
> > serial number, but different MACs.
> > 
> > So we put the change in one patch to avoid distro vendors missing this
> > change when backporting the MANA driver.
> > 
> > Thanks,
> > - Haiyang  
> 
> The netvsc change should come together in the same patch with this VF
> driver, otherwise the multi-vPorts functionality doesn't work properly.
> 
> The netvsc change should not break any other existing VF drivers, because
> Hyper-V NIC SR-IOV implementation requires the the NetVSC network
> interface and the VF network interface should have the same MAC address,
> otherwise things won't work.
> 
> Thanks,
> Dexuan

Distro vendors should be able to handle a patch series.
Don't see why this could not be two patch series.