[PATCH 1/2] wifi: mac80211: introduce ieee80211_refresh_tx_agg_session_timer()

[Ryder Lee]

On Tue, 2023-02-21 at 10:57 +0100, Johannes Berg wrote:
> Hi,
> 
> > > > Since there's no any keep alive packet being received by host
> > > > stack, leads to mac80211 destrory BA sesion.
> > > > 
> > > 
> > > More specifically, the BA session relies on client side's Tx data
> > > to
> > 
> > Typo... I mean *our side*. Something like this
> 
> Sorry. I'm just totally confused - I thought the initiator only set
> the
> timeout, but I see now that it's negotiated and the actual value used
> is
> from the client.
> 
> Which explains basically everything.
> 
> 

Yup ... after accepting the AddBA Response we activated a timer,
*resetting it after each frame that we send* -
sta_tx_agg_session_timer_expired().

The .net_fill_forward_path() offloads tx path to HW, so it can only
rely on other way to reset as mac80211 isn't aware of that.

Ryder