Am Donnerstag, 24. März 2011 schrieb Emmanuel Grumbach:

The originator tried to send data and this data didn't get acked. In
this case a BAR should be sent regardless the reason why this frame
didn't get acked.
This is done by reporting IEEE80211_TX_STAT_AMPDU_NO_BACK to mac80211.
Can it be that the rt2800 doesn't report properly the xmit failure ?

Good point. During "normal" operation rt2800 correctly sets
IEEE80211_TX_STAT_AMPDU_NO_BACK on a failure, so it _should_ have done
this in the above example but I'll add some more debug output and verify
this again.

Helmut