mac80211: fix offloaded BA session traffic after hw restart
When starting an offloaded BA session it is unknown what starting sequence number should be used. Using last_seq worked in most cases except after hw restart. When hw restart is requested last_seq is (rightfully so) kept unmodified. This ended up with BA sessions being restarted with an aribtrary BA window values resulting in dropped frames until sequence numbers caught up. Instead of last_seq pick seqno of a first Rxed frame of a given BA session. This fixes stalled traffic after hw restart with offloaded BA sessions (currently only ath10k). Signed-off-by: NMichal Kazior <michal.kazior@tieto.com> Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
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