netdev - RE: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)

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Date:   Thu, 8 Apr 2021 16:57:13 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Stephen Hemminger <stephen@...workplumber.org>,
        Randy Dunlap <rdunlap@...radead.org>
CC:     Dexuan Cui <decui@...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>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: RE: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure
 Network Adapter (MANA)



> -----Original Message-----
> From: Stephen Hemminger <stephen@...workplumber.org>
> Sent: Thursday, April 8, 2021 12:52 PM
> To: Randy Dunlap <rdunlap@...radead.org>
> Cc: Dexuan Cui <decui@...rosoft.com>; davem@...emloft.net;
> kuba@...nel.org; KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; wei.liu@...nel.org; Wei Liu
> <liuwe@...rosoft.com>; netdev@...r.kernel.org; leon@...nel.org;
> andrew@...n.ch; bernd@...rovitsch.priv.at; linux-kernel@...r.kernel.org;
> linux-hyperv@...r.kernel.org
> Subject: Re: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure
> Network Adapter (MANA)
> 
> On Thu, 8 Apr 2021 09:22:57 -0700
> Randy Dunlap <rdunlap@...radead.org> wrote:
> 
> > On 4/8/21 2:15 AM, Dexuan Cui wrote:
> > > diff --git a/drivers/net/ethernet/microsoft/Kconfig
> > > b/drivers/net/ethernet/microsoft/Kconfig
> > > new file mode 100644
> > > index 000000000000..12ef6b581566
> > > --- /dev/null
> > > +++ b/drivers/net/ethernet/microsoft/Kconfig
> > > @@ -0,0 +1,30 @@
> > > +#
> > > +# Microsoft Azure network device configuration #
> > > +
> > > +config NET_VENDOR_MICROSOFT
> > > +	bool "Microsoft Azure Network Device"
> >
> > Seems to me that should be generalized, more like:
> >
> > 	bool "Microsoft Network Devices"
> 
> Yes, that is what it should be at this level.
> 
> >
> >
> > > +	default y
> 
> This follows the existing policy for network vendor level
> 
> > > +	help
> > > +	  If you have a network (Ethernet) device belonging to this class, say Y.
> > > +
> > > +	  Note that the answer to this question doesn't directly affect the
> > > +	  kernel: saying N will just cause the configurator to skip the
> > > +	  question about Microsoft Azure network device. If you say Y, you
> >
> > 	           about Microsoft networking devices.
> >
> > > +	  will be asked for your specific device in the following question.
> > > +
> > > +if NET_VENDOR_MICROSOFT
> > > +
> > > +config MICROSOFT_MANA
> > > +	tristate "Microsoft Azure Network Adapter (MANA) support"
> > > +	default m
> >
> > Please drop the default m. We don't randomly add drivers to be built.
> 
> Yes, it should be no (or no default which is the default for default)
> 
> > Or leave this as is and change NET_VENDOR_MICROSOFT to be default n.
> >
> >
> > > +	depends on PCI_MSI && X86_64
> > > +	select PCI_HYPERV
> > > +	help
> > > +	  This driver supports Microsoft Azure Network Adapter (MANA).
> > > +	  So far, the driver is only validated on X86_64.
> >
> > validated how?
> 
> Maybe change validated to supported?

Sounds better. We will change it to "supported".
Also other suggested changes.

Thanks,
- Haiyang