Re: [Xen-devel] [PATCH 08/11] add tpmfront, tpm_tis, and tpmback drivers to mini-os

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Ian Campbell writes ("Re: [Xen-devel] [PATCH 08/11] add tpmfront, tpm_tis, and 
tpmback drivers to mini-os"):
> > diff --git a/extras/mini-os/include/tpm_tis.h 
> > b/extras/mini-os/include/tpm_tis.h
> > new file mode 100644
> > index 0000000..b463cea
> > --- /dev/null
> > +++ b/extras/mini-os/include/tpm_tis.h
> > @@ -0,0 +1,74 @@
> > +/*
> > + * Copyright (c) 2010-2012 United States Government, as represented by
> > + * the Secretary of Defense.  All rights reserved.
> > + *
> > + * This program is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU General Public License version 2
> > + * as published by the Free Software Foundation; or, when distributed
> > + * separately from the Linux kernel or incorporated into other
> > + * software packages, subject to the following license:
> > + *
> > + * Permission is hereby granted, free of charge, to any person
> > + * obtaining a copy of this source file (the "Software"), to deal
 [ MIT licence continues ]
...
> > + * Based upon the files:
> > + *  drivers/char/tpm/tpm_tis.c
> > + *  drivers/char/tpm/tpm.c
> > + * from the Linux kernel, which are Copyright (C) 2006 IBM Corporation
> 
> Given that then I don't think you have the authority to dual license
> code owned by IBM as GPL or the MIT style thing above -- these files are
> subject to the licensing terms of those original files (which looks to
> be GPL v2 only).

Indeed so.  This is totally forbidden, I'm afraid.  Are you sure you
know what you are doing with the licensing here ?  Do you have anyone
nearby who could help you with this ?

The basic principle is that the existing source file licence must
remain unchanged.

> It might be acceptable to have a GPL header as the primary followed by a
> "modifications by Matthew Fioravante/US Gov/Secretary Defense are also
> licensed under... .MIT thing ...." but I'd want to see a second opinion
> on that I think.

This is in theory possible but in practice not a good idea.

Ian.

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