mac80211: introduce IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL
Commit f0425bed "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 be03d4a4 "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 f0425bed, instead of reverting it, introduce flag that when used will restore mac80211 behaviour before the commit. Cc: stable@vger.kernel.org Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com> [replaced link with mid.gmane.org that has message-id] Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
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