Commit f0425beda4d404a6e751439b562100b902ba9c98 "mac80211: retry sending failed BAR frames later instead of tearing down aggr" caused regression on rt2x00 hardware (connection hangs). This regression was fixed by commit be03d4a45c09ee5100d3aaaedd087f19bc20d01 "rt2x00: Don't let mac80211 send a BAR when an AMPDU subframe fails". But the letter commit, caused yet another problem reported in https://bugzilla.kernel.org/show_bug.cgi?id=42828#c22 After long discussion in this thread: http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2012-October/005349.html and testing various alternative solutions, which failed on one or other setup, we have no other good fix for the issues like just revert both mentioned earlier commits. To do not affect other hardware which benefit from commit f0425beda4d404a6e751439b562100b902ba9c98, instead of reverting it, introduce flag that when used will restore mac80211 behaviour before the commit. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> --- It's fine to queue this to 3.8 and this will get 3.7 and older releases through -stable. include/net/mac80211.h | 5 +++++ net/mac80211/status.c | 6 +++++- 2 files changed, 10 insertions(+), 1 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 82558c8..d481cc6 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1253,6 +1253,10 @@ struct ieee80211_tx_control { * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any * P2P Interface. This will be honoured even if more than one interface * is supported. + * + * @IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL: On this hardware TX BA session + * should be tear down once BAR frame will not be acked. + * */ enum ieee80211_hw_flags { IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, @@ -1281,6 +1285,7 @@ enum ieee80211_hw_flags { IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, + IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL = 1<<26, }; /** diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 101eb88..c511e9c 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -432,7 +432,11 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) IEEE80211_BAR_CTRL_TID_INFO_MASK) >> IEEE80211_BAR_CTRL_TID_INFO_SHIFT; - ieee80211_set_bar_pending(sta, tid, ssn); + if (local->hw.flags & + IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL) + ieee80211_stop_tx_ba_session(&sta->sta, tid); + else + ieee80211_set_bar_pending(sta, tid, ssn); } } -- 1.7.4.4 -- 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
