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authorStanislaw Gruszka <sgruszka@redhat.com>2012-12-03 12:56:33 +0100
committerBen Hutchings <ben@decadent.org.uk>2013-01-16 01:13:22 +0000
commit23bc781f110358b874423c4651804f5bcd195887 (patch)
tree91d3c9a3256fd19f69c9b59b98438e7f62b298cf /net
parent226d487976cff4f4328c664a58e4dc027c4e0209 (diff)
mac80211: introduce IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL
commit 5b632fe85ec82e5c43740b52e74c66df50a37db3 upstream. 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. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> [replaced link with mid.gmane.org that has message-id] Signed-off-by: Johannes Berg <johannes.berg@intel.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/status.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 16518f386117..67df50ec417f 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -429,7 +429,11 @@ 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);
}
}