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

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Message-ID: <MW2PR2101MB089264E445CE0F4E08BC913DBF4C9@MW2PR2101MB0892.namprd21.prod.outlook.com>
Date:   Fri, 16 Apr 2021 18:44:31 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
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)

> From: Stephen Hemminger <stephen@...workplumber.org>
> Sent: Friday, April 16, 2021 11:09 AM
>  ...
> 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.

Ok. Will split this into 2 patches (the first one is the netvsc change, and the
second is the Linux VF driver) and post v8 shortly.