linux-kernel - Re: [PATCH 02/14] soundwire: Add SoundWire bus type

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Message-ID: <20171020162042.GW30097@localhost>
Date:   Fri, 20 Oct 2017 21:50:42 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Philippe Ombredanne <pombredanne@...b.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        ALSA <alsa-devel@...a-project.org>, Mark <broonie@...nel.org>,
        Takashi <tiwai@...e.de>,
        Pierre <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Shreyas NC <shreyas.nc@...el.com>, patches.audio@...el.com,
        alan@...ux.intel.com,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Sagar Dharia <sdharia@...eaurora.org>,
        srinivas.kandagatla@...aro.org, plai@...eaurora.org,
        Sudheer Papothi <spapothi@...eaurora.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 02/14] soundwire: Add SoundWire bus type

On Fri, Oct 20, 2017 at 06:03:24PM +0200, Philippe Ombredanne wrote:
> On Fri, Oct 20, 2017 at 12:45 PM, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> > On Thu, Oct 19, 2017 at 08:33:18AM +0530, Vinod Koul wrote:
> >> diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c
> >> new file mode 100644
> >> index 000000000000..a14d1de80afa
> >> --- /dev/null
> >> +++ b/drivers/soundwire/bus_type.c
> >> @@ -0,0 +1,229 @@
> >> +/*
> >> + *  This file is provided under a dual BSD/GPLv2 license.  When using or
> >> + *  redistributing this file, you may do so under either license.
> >> + *
> >> + *  GPL LICENSE SUMMARY
> >> + *
> >> + *  Copyright(c) 2015-17 Intel Corporation.
> >> + *
> >> + *  This program is free software; you can redistribute it and/or modify
> >> + *  it under the terms of version 2 of the GNU General Public License as
> >> + *  published by the Free Software Foundation.
> >> + *
> >> + *  This program is distributed in the hope that it will be useful, but
> >> + *  WITHOUT ANY WARRANTY; without even the implied warranty of
> >> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> >> + *  General Public License for more details.
> >> + *
> >> + *  BSD LICENSE
> >> + *
> >> + *  Copyright(c) 2015-17 Intel Corporation.
> >> + *
> >> + *  Redistribution and use in source and binary forms, with or without
> >> + *  modification, are permitted provided that the following conditions
> >> + *  are met:
> >> + *
> >> + *    * Redistributions of source code must retain the above copyright
> >> + *      notice, this list of conditions and the following disclaimer.
> >> + *    * Redistributions in binary form must reproduce the above copyright
> >> + *      notice, this list of conditions and the following disclaimer in
> >> + *      the documentation and/or other materials provided with the
> >> + *      distribution.
> >> + *    * Neither the name of Intel Corporation nor the names of its
> >> + *      contributors may be used to endorse or promote products derived
> >> + *      from this software without specific prior written permission.
> >> + *
> >> + *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> >> + *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> >> + *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> >> + *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> >> + *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> >> + *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> >> + *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> >> + *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> >> + *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> >> + *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> >> + *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> >
> > Are you _sure_ that code that interacts with the driver core can have a
> > dual-license here?  Have you explained to lawyers what you are doing
> > here (wrapping gpl-only symbols with non-gpl-only exports)?
> >
> > And why dual license something that will only ever work on Linux?
> >
> > And finally, put a real SPDX header up there so that people don't have
> > to parse that horrid amount of text to try to determine exactly what
> > that license is.
> 
> Vinod:
> 
> It is hard to parse for people ... but it is quite hard for tools to catch
> this too. This license notice is so peculiar and special that I had to
> make a special detection rule just for it [1] in my tool :|
> Please have mercy: could you not pick something simpler?

Sorry for the trouble it caused. The code is Dual license as indicated by
first two lines. I didn't invent the text here, legal folks did and used
the standard template available in my company

I quick grep on Dual license users looks like we already have this in kernel
code. See drivers/ntb/hw/intel/ntb_hw_intel.c

> [1]  https://github.com/nexB/scancode-toolkit/blob/develop/src/licensedcode/data/rules/gpl-2.0_or_bsd-new33.RULE

-- 
~Vinod