Greg KH wrote:

>>>Personally, I think it's a stupid thing to try to license this code in a
>>>dual way, as any port someone is going to have to do to get this code to
>>>work in another os will be almost a complete rewrite in the end
>>>anyway...
>>
>>I think that companies want to be able to make derivative works without 
>>needing to make the derivative open source, versus porting it to 
>>another OS.
> 
> And then run that derivitave work on a Linux GPL kernel?  Hah, good luck
> with your lawyers if you try to do that.  And good luck trying to work
> around symbols that the openib code is using that are marked
> EXPORT_SYMBOL_GPL().
> 
> Why do people try to do such stupid things, haven't the IB members
> learned from the past...

I'm not criticizing or defending this, just guessing the reason for the 
dual license.