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. > > As far as rt2x00 is concerned, all hardware that supports multi-bss also > > support HW sequence counters. rt2400pci and rt2500pci are the only ones > > requiring SW sequence counters, and they can't do multi-bss. > > Do they keep per-BSS counters? Not sure what you mean, but rt2400pci and rt2500pci don't support multi-bss, so they wouldn't have per-BSS counters. rt61pci and rt73usb do support multi-bss and keep the sequence counting completely in firmware/hardware and I am not sure how they can be read by the driver. So I don't know how those are stored either. Ivo -- 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
