[ofa-general] mlx4 changing RNR_RETRY for an established qp

[Andy Grover]

Hi Vlad,

Bringing up an old issue...

With RDS-level flow control enabled, RDS attempts to set rnr_counter to
0 on an already connected QP by transitioning through SQD state. SQD is
not supported on ConnectX, and so we either need do it the right way or
make other plans.

Is there an alternative way to adjust rnr_counter, or should we just
assume this is unchangeable once connected?

Thanks -- Regards -- Andy