Andriy Voskoboinyk abb0adffde net80211: add a timer to flush fast-frames queues.
This should allow to drop 'ieee80211_ff_[age/flush]' calls from drivers
(an additional call can be made from ieee80211_tx_complete()
for non-default ieee80211_ffagemax values to prevent stalls -
but it will require an additional counter for transmitted frames).

Tested with RTL8821AU, STA mode (A-MSDU part only).

Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D9984
2017-03-19 20:05:21 +00:00
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