RDMA/cma: Do not modify sa_family when setting loopback address
cma_resolve_loopback is called after an rdma_cm_id has been bound to a specific sa_family and port. Once the source sa_family for the id has been set, do not modify it. Only the actual IP address portion of the source address needs to be set. As part of this fix, we can simplify setting the source address by moving the loopback address assignment from cma_resolve_loopback to cma_bind_loopback. cma_bind_loopback is only invoked when the source address is the loopback address. Finally, add loopback support for AF_IB as part of the change. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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