[PATCH] soundwire: clarify SPDX use of GPL-2.0

[Pierre-Louis Bossart]

On 6/1/20 12:38 AM, Greg KH wrote:
> On Mon, Jun 01, 2020 at 01:28:07AM +0800, Bard Liao wrote:
>> From: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
>>
>> Change SPDX from GPL-2.0 to GPL-2.0-only for Intel-contributed
>> code. This was explicit before the transition to SPDX and lost in
>> translation.
> 
> It is also explicit in the "GPL-2.0" lines as well, did you read the
> LICENSES/preferred/GPL-2.0 file for the allowed tags to be used for this
> license?
> 
> So this doesn't change anything, and we are trying to cut down on this
> type of churn until, maybe, after the whole kernel has proper SPDX
> lines.

My commit message was misleading, sorry. For SoundWire, we recently 
added new files with GPL-2.0-only (master + sysfs), as recommended since 
the short GPL-2.0 identifier is deprecated 
(https://spdx.org/licenses/GPL-2.0.html https://spdx.org/licenses/).

Intel does not mind if we delay this change, you are right that this 
doesn't change anything license-wise. I just felt it was a good time to 
align old and new contributions to avoid having half of the files with 
GPL-2.0 and half with GPL-2.0-only.

We still have quite a few patches for SoundWire (~80 coming w/ 7k lines 
changed), so those changes are really minimal in comparison with the 
actual 'churn' to fix programming sequences, power management, 
multi-link management and bit allocation.

Oh and this was not intended to be added to 5.8 btw or pulled as a fix, 
really nothing to do with the merge window.

If you prefer us to keep this change on the back burner, that's fine, 
the only intent was to keep all SoundWire-related files consistent.