Users needed to test Wi-Fi stability on Linksys WRT3200ACM & WRT32X on OpenWrt 21.02

[nbd]

@cotequeiroz

The most interesting fact is that the regression affected a rather specific group of devices, most notably Apple devices, while others were unaffected. I wonder how that can be explained.

The problem is triggered by tearing down and re-establishing a-mpdu sessions. This depends on traffic patterns and client behavior. The first agg session is likely to work, since it will have a low seq number and the driver's seqno will be mostly in sync with mac80211's seqno. Subsequent sessions will trigger this more severely.