Revert "RDMA/cma: Simplify rdma_resolve_addr() error flow"

Revert "RDMA/cma: Simplify rdma_resolve_addr() error flow"

commit e4103312d7b7afb8a3a7a842a33ef2b1856b2c0f upstream.

This reverts commit 219d2e9dfda9431b808c28d5efc74b404b95b638.

The call chain below requires the cm_id_priv's destination address to be
setup before performing rdma_bind_addr(). Otherwise source port allocation
fails as cma_port_is_unique() no longer sees the correct tuple to allow
duplicate users of the source port.

rdma_resolve_addr()
  cma_bind_addr()
    rdma_bind_addr()
      cma_get_port()
        cma_alloc_any_port()
          cma_port_is_unique() <- compared with zero daddr

This can result in false failures to connect, particularly if the source
port range is restricted.

Fixes: 219d2e9dfda9 ("RDMA/cma: Simplify rdma_resolve_addr() error flow")
Link: https://lore.kernel.org/r/20200212072635.682689-4-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>