Hello, I hope this is the correct forum for this type of question. What does mac80211 expect driver/hw to do when an A-MPDU is received without an existing block ack agreement? This may occur when an existing RX BACK agreement times out, and the peer STA fails to hear the DELBA frame. The best option I can think of would be to drop the subframes and re-transmit the DELBA, but this (at least the second part) should be handled by mac80211 and not the driver. The standard doesn't seem to be clear on this point (not that it's clear on many points). /Johan -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html