055b827e11
per-packet discard of every received packet increases latency and decrease throughput. INstead, Spin on S_COMMAND_IN_PROGESS for enough iterations as the expected time to completion. Only do DELAY()/poll loops (as suggested by Jason Thorpe) if spinning fails. Take PCI as fastest case and compute worst-case estimate. Shorten DELAY() in S_COMMAND_COMPLETE polling-loop up 10, loop-count down. to speed up epreset() completion (m/c filter change, ifup/ipdown, etc).