Re: [PATCH] USB: mark USB drivers as being GPL only

[David Newall <davidn@davidnewall.com>]

Marcel Holtmann wrote:
>>> If the developers say that this symbol can only be used in GPL code (and
>>> with EXPORT_SYMBOL_GPL it is quite clear) then you have to obey to that
>>> license or don't use this symbol at all.
>>>       
Not sure who wrote the above, but it contains a glaring legal error:
Developers choose an invalid forum to impose licence conditions when
they choose to do so via EXPORT_SYMBOL_GPL.  The licence that prevails
is GPL, and nowhere does it say that protected works may only be used by
other GPL works.  In fact, such a notion is alien to the GPL.


>>> If you use that symbol inside non-GPL (meaning you link at runtime) then
>>> you are in violation of the GPL license. We can't make it much clearer.
>>>       
>> Not necessarily so.  The developers feel that any code using that symbol 
>> is necessarily a derivative work, but at the end of the day it would be 
>> up to the legal system to decide whether it really is or not.
>>     
Of course courts are the proper forum to decide "fact" from opinion, but
a statement of claim, which is a necessary preliminary to such an
action, must state from what the alleged offending work is derived.  The
fact that claim of violation is made before any violating work has been
identified, or even created, does work against such an action.  A 
half-decent lawyer should be able to have any such action dismissed on
that basis alone.

I wonder if it isn't fraud to offer a work under the GPL and then to try
to impose new conditions.