From 5b632fe85ec82e5c43740b52e74c66df50a37db3 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Mon, 3 Dec 2012 12:56:33 +0100 Subject: mac80211: introduce IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL 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 latter commit caused yet another problem reported in https://bugzilla.kernel.org/show_bug.cgi?id=42828#c22 After long discussion in this thread: http://mid.gmane.org/20121018075615.GA18212@redhat.com 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@vger.kernel.org Signed-off-by: Stanislaw Gruszka [replaced link with mid.gmane.org that has message-id] Signed-off-by: Johannes Berg --- net/mac80211/status.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 6400037dd8ec..04f6bf292a57 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -502,7 +502,11 @@ 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); } } -- cgit v1.2.1