On Wednesday 09 July 2008 17:08:04 Ivo van Doorn wrote: > On Wednesday 09 July 2008, Johannes Berg wrote: > > > > > If rt2x00 would use a global lock to block all TX and beacons, then yes. > > > But rt2x00 uses per-queue locking. When a beacon is being updated rt2x00 > > > will still allow regular frames to be queued. > > > > That just widens the window. And if you have multiple queues then you > > can't do sw sequence numbers anyway because the hardware might reorder > > the frames. > > That doesn't seem to be a problem in the legacy drivers, so I guess the hardware > does *something* to prevent problems. Well, legacy drivers don't use mac80211. Sequence counting can trivially be fixed by doing it _right_ before queueing the packet to the hardware in the driver, with the TX queue lock held, that must already be there. -- Greetings Michael. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
