There's sleep queue support in the net80211 stack but that doesn't
close the race for what failed to TX because the station went to sleep
with stuff in the hostap TX queue.
That small window is small for 11bg/11a rates but for 11n it could be
lots of frames.

That's what I have to port to FreeBSD's ath driver (and then when it's
all stable and sensible looking, migrate back into net80211.)



Adrian