On Tue, 2018-10-23 at 10:44 +0300, Ali MJ Al-Nasrawy wrote: > Hi, > > I am trying to debug brcmsmac wireless driver for spamming the log with > the message: > [...] START: tid 2 is not agg'able > for it does not support AMPDU aggreggation for TID 2. > > And after quick tracing, I found that mac80211 keeps trying to start > AMPDU session for the _same TID and STA_ despite that the driver returns > non-zero code via its ampdu_action callback and that non-zero return > codes are recognized as the "HW unavailable" for such session > (agg-tx.c:ieee80211_tx_ba_session_handle_start) > > So, Is that an expected behaviour from mac80211 or not?? This depends on the rate control algorithm, it triggers this. I think - perhaps depending on the return value - mac80211 *does* give up eventually, but not really sure. Perhaps just remove the message? johannes
