netdev - Re: [PATCH] [v2] wireless: Initial driver submission for pureLiFi devices

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Date:   Fri, 16 Oct 2020 11:23:45 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Johannes Berg <johannes@...solutions.net>,
        Srinivasan Raju <srini.raju@...elifi.com>,
        mostafa.afgani@...elifi.com,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] [v2] wireless: Initial driver submission for pureLiFi devices

Leon Romanovsky <leon@...nel.org> writes:

> On Wed, Sep 30, 2020 at 12:11:24PM +0200, Johannes Berg wrote:
>> On Wed, 2020-09-30 at 12:55 +0300, Leon Romanovsky wrote:
>> > On Wed, Sep 30, 2020 at 11:01:27AM +0300, Kalle Valo wrote:
>> > > Leon Romanovsky <leon@...nel.org> writes:
>> > >
>> > > > > diff --git a/drivers/net/wireless/purelifi/Kconfig
>> > > > b/drivers/net/wireless/purelifi/Kconfig
>> > > > > new file mode 100644
>> > > > > index 000000000000..ff05eaf0a8d4
>> > > > > --- /dev/null
>> > > > > +++ b/drivers/net/wireless/purelifi/Kconfig
>> > > > > @@ -0,0 +1,38 @@
>> > > > > +# SPDX-License-Identifier: GPL-2.0
>> > > > > +config WLAN_VENDOR_PURELIFI
>> > > > > +	bool "pureLiFi devices"
>> > > > > +	default y
>> > > >
>> > > > "N" is preferred default.
>> > >
>> > > In most cases that's true, but for WLAN_VENDOR_ configs 'default y'
>> > > should be used. It's the same as with NET_VENDOR_.
>> >
>> > I would like to challenge it, why is that?
>> > Why do I need to set "N", every time new vendor upstreams its code?
>>
>> You don't. The WLAN_VENDOR_* settings are not supposed to affect the
>> build, just the Kconfig visibility.
>
> Which is important to me, I'm keeping .config as minimal as possible
> to simplify comparison between various builds.

IIRC the 'default y' is to avoid breaking when updating from an old,
pre-vendor, kernel config (for example with 'make oldconfig'), otherwise
all wireless drivers would have been disabled without a warning. But as
wireless vendors were introduced back in 2015 in v4.5-rc1 I don't think
we need to worry about that anymore. But I would like to keep this
behaviour consistent across all vendors, so they all should be changed
at the same time in one patch.

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches