> increment counter comp_events_completed only if channel is set
> this will prevent the while loop below in ibv_cmd_destroy_cq() to
> hang if consumer calls ibv_ack_cq_events() without any assigned
> channel
Is there any valid reason a consumer would ack events if no channel is
set? There's no way to get an event to ack in that case, as far as I know.
Maybe the real bug is in:
while (cq->comp_events_completed != resp.comp_events_reported ||
cq->async_events_completed != resp.async_events_reported)
it might be safer to change the != to a < (actually to a subtraction
to handle wraparound), just to avoid hanging if someone accidentally
acks too many events.
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