[ewg] rdma/cm: disallow loopback address for iwarp devices

[Steve Wise]

Sean, can you try openmpi?  It fails for me, and yet ucmatose succeeds.  
I don't understand the difference yet...


Sean Hefty wrote:
>> On my OFED 1.4.1 RHEL4u6 systems, rdma_bind_addr() fails when attempting to
>> bind to 127.0.0.1 per the email I sent Friday:
>>
>>    http://www.spinics.net/lists/linux-rdma/msg02568.html
>>     
>
> This is what I see over IB on 2.6.26, with a couple extra prints added to
> cmatose:
>
> cst-lin1:/home/mshefty/librdmacm# examples/ucmatose -b 127.0.0.1
> cmatose: starting server
> src addr 0x100007f
> rdma_bind_addr: 0
>
> so we're missing something else.
>
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