MAX_RX_REFILL
refill_fl(adap, fl, min(MAX_RX_REFILL, fl->size - fl->credits),
refill_fl(adap, fl, min(MAX_RX_REFILL, fl->size - fl->credits - 1),
refill_fl(adap, fl, min(MAX_RX_REFILL, fl_cap(fl) - fl->avail),
min((unsigned int)MAX_RX_REFILL, fl_cap(fl) - fl->avail),