[openib-general] possible CMA bug

[Sean Hefty]

Steve Wise wrote:
> I'm using the new rdma cma interface and i've perhaps stumbled onto a 
> bug.  I'm trying to bind to port 9999 on both IB ports of a mthca 
> device.  The IPoIB interfaces for the HCA are configured as two seperate 
> subnets.  The second rdma_listen() always fails with EBUSY.  Maybe this 
> is a limitation in the CMA design, but TCP stacks allow binding to the 
> same port on different ip addresses.  And the CMA interface allows it 
> too as long as the two ip addresses map to different IB devices.   
> Whether this should work or not, I am seeing a crash when I try to 
> destroy the cm_id after the rdma_listen() failure.

This has been fixed in the latest check-in (revision 4313).

- Sean