Re: tx_status reporting of RTS/CTS frames

[Ivo van Doorn <ivdoorn@gmail.com>]

Hi,

> > rt2x00 devices can't generate rts/cts frames themselves, but rely on the
> > driver to generate them. Also, the hardware reports tx status back for
> > those frames. Now the question is whether these frames should be
> > reported back to mac80211 using ieee80211_tx_status[_irqsafe]. AFAIK,
> > this has some subtle effects, e.g. they won't show up on monitor
> > interfaces if we don't report them.
> 
> They never show up on monitor interfaces for all other hardware because
> there the hardware handles them. How is it that rt2x00 cannot handle
> rts? It has to at least know that an RTS was sent and to send the frame
> only after the CTS, and that needs to be a MAC function and cannot be
> implemented in host software.
> 
> So, I'd think they shouldn't be reported at all.

Than this is a problem in multiple mac80211 drivers, since rt2x00 previously
did filter out rts and cts frames when reporting txdone events to mac80211
and upon request on the linux-wireless list that filter was disabled, because
the other drivers didn't filter the RTS/CTS frames so for consistent behavior
the filter was removed from rt2x00.

Ivo