RE: [PATCH] IB: new module params. cm_response_timeout, max_cm_retries

Create two kernel parameters, in order to make variables configurable.
i.e. cma_cm_response_timeout for CM response timeout,
     and cma_max_cm_retries for the number of retries.

They can now be configured via command line for the kernel modules.
For example:
    # modprobe ib_srp cma_cm_response_timeout=30 cma_max_cm_retries=60

Rather than using a module parameter, I'd rather see this these values be controlled through /proc/sys/net/rdma_cm, similar to how the rdma_ucm handles max_backlog.  For the rdma_cm, I also prefer something more generic.  CM retries is fine, but exposing wonky IB timeout (4.096 x 2^X us) to the user is less than ideal.

- Sean
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