linux-kernel - 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 09:52:22 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     decui@...rosoft.com, davem@...emloft.net, kuba@...nel.org,
        kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, 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?